All around the world, there are certain places that are so frightening, it's recommended that you should not travel to these locations all alone. These hair-raising spots are not for the faint of heart and are quite disturbing, to say the least. However, if you are a thrill seeker and consider yourself to be a daredevil than you might have heard about these unnerving areas and can't wait to explore them all.

Across Europe, you can find castles, chateaus, fortresses and even an entire town known for their unusual and alarming activity that have left visitors uneasy. Bran Castle in Romania, which became famous thanks to the legend of Dracula, is considered to be haunted because of a brutal medieval past the castle had witnessed. The small town of Craco, Italy, has been left abandoned for years because of natural disasters and its crumbling buildings; empty and quiet streets have people staying far, far away.

If you aren't afraid of the unknown, actually find enjoyment visiting abandoned hospitals, deserted medieval castles and even city's that look like something out of a horror film, then you are in luck because we've compiled a list of twenty spooky places on earth where you shouldn't ever travel alone.

20 The Island of the Dolls, Mexico

Just south of Mexico City, you'll find a small island which was never meant to be a tourist attraction but has people from all over the world visiting because of the hundreds of dolls hanging all over the island. There is a dark story behind Isla de las Munecas (The Island of the Dolls) and witnesses claiming to hear some of these dolls whispering to each other, moving their heads and arms and giving visitors a strange feeling. A man by the name of Don Julian Santana Barrera began hanging dolls all around the island, after finding a floating doll in the canal. After his death, visitors started bringing more dolls and while locals believe an island is a charming place, you can't help but feel a bit disturbed by it all.

19 The Hill of Crosses, Lithuania

You'll never find a place like this in the world where you are surrounded by thousands of crosses brought by the people visiting this unique place in Lithuania. Known as The Hill of Crosses, this area has been a site of pilgrimage for hundreds of years. The tradition of leaving crosses began after the uprising of a Russian tsar was put down in 1831. Today, there are over 200,000 crosses, carvings, and shrines made from wood and metal all over this area. According to Daily Mail, crosses appearing on the hill became a symbol of resistance to the communist regime when religion was forbidden. Thousands of these crosses bear names and even messages for help. You can visit the site, but you may want to bring along a friend.

18 Craco, Italy

Craco, Italy is an abandoned medieval town in Italy that looks like something straight out of a scary movie. The town has been left to decay and crumble for over fifty years because of natural disasters which have made this area a dangerous place to live in. The town has faced a plague, famine, landslides, and earthquakes, and inhabitants were forced to leave. Still, thrill seekers from around the world come to visit this quiet and uninhabited part of southern Italy. Craco's dramatic landscape, architecture, castle, and towers make this small town all the more disturbing, yet intriguing to those who are looking to discover something a little more mysterious in Italy.

17 Sedlec Ossuary, Czech Republic

The Sedlec Ossuary or better known as the Church of Bones is one of the most unusual and bizarre chapels you will ever come across. Located in Sedlec, in the Czech Republic, this place might look like an ordinary church from the outside, but step inside an see that it is covered and decorated in over 60,000 human bones. One of the most fascinating and yet hair-raising features in this chapel is the chandelier that hangs above which is made of all bones and contains at least one of every human bone. On display, you can also see two large bone chalices, four baroque bone candelabras, six gigantic bone pyramids, a family crest created in bone and skull candleholders.

16 Eastern State Penitentiary, Pennsylvania, USA

The Eastern State Penitentiary in Pennsylvania was once the most famous prisons in the world and held some of America's most notorious criminals including "Scarface" Al Capone and "Slick Willie" Sutton. The prison was designed to look like a medieval or gothic castle with architect John Haviland stating that the building's design should "strike fear into the hearts of those who thought of committing a crime." While the prison is now left in ruins, you can still take a tour of its grounds, if you dare. You can see Al Capone's cell, which has been restored to look like it did when he was serving eight months of his life and walk through the famous Cellblock 7 and its alarming hospital.

15 Screaming Tunnel, Niagara Falls, Ontario, Canada

There is a small limestone tunnel, running underneath what was once the Grand Trunk Railway lines that are considered one of the most haunted places in Niagara Falls. There are multiple legends surrounding the Screaming Tunnel, which makes it all the more frightening. The tunnel was constructed in the early 1800's and stories claim that a young girl who passed away within its walls haunts it. Not many people would dare walk through the tunnel alone, especially at night with the many local legends surrounding it. But, if you're looking for a thrill the next time you find yourself in Niagara, you know exactly where to go.

14 Edinburgh Castle, Scotland

Edinburgh Castle is one of the most famous Scottish castles as it sits high above on volcanic rock, more than 250 feet above the city of Edinburgh. The castle is also believed to be haunted by numerous reports of strange paranormal activity occurring over the years. The castle was constructed in the early 12th century and has witnessed executions, surprise attacks, and a brief capture by the English. According to Visit Scotland, former prisoners of the castle are believed to haunt the dungeons. In 2001, Edinburgh Castle became the site of one of the largest paranormal investigations in history. According to Time, visitors may feel like something is tugging at their clothing, sudden drops in temperature and shadowy figures.

13 Tower of London, England

In the 1070's William, the Conqueror built a mighty and massive stone fortress in London to protect and defend him, his royal family and his royal possessions. Throughout history, the London Tower has witnessed imprisonment, royal tragedy, and disappearances. The Chapel Royal is best known as being the burial place of the most famous Tower prisoners, three queens of England: Anne Boleyn, Catherine Howard, and Jane Grey. The Tower of London has long been a visitor attraction because of the numerous legends of ghosts and people have become fascinated with the fortress' alarming history. Anne Boleyn is also said to haunt the site of where she was put to death.

12 The North Yungas Road, Bolivia

The North Yungas Roads in Bolivia is one of the most frightening roads in the world. To one side is a solid rock while the other side is a 2,000-foot abyss and in between is just a 12-foot wide path where cars, bicyclists and people just walking use to go to their destinations. The route is one of the world's most dangerous, with many sections unpaved and lack guardrails. There are numerous mudslides and warm and humid air can bring in heavy rain and fog. Every year, an estimated 200 to 300 people have seen their end here. There are special rules for driving on the North Yungas road such as drivers having to ride on the left since the left has a better view of the edge of the road. This is definitely not a road you want to speed on.

11 The Burma Railway, Thailand

The Japanese built the Burma Railway, also known as the Death Railway in Thailand, during World War II to connect Yangon, the then capital of Burma, with Bangkok. The railway earned it's alarming nickname after thousands of people lost their lives in the process of building the 250 miles of rail over fifteen months. Their makeshift graves where lined the sides of the tracks before being moved to graveyards. Today, only part of the original rail is in operation, however, people are reminded of the POWs and cheap local laborers went through to construct the railway and dying in the process of completing it.

10 Stanley Hotel, Colorado, USA

If you are a fan of Stephen King than you might recognize the Stanley Hotel. This Colorado hotel was the author's muse for the famous film, "The Shining." According to Come To Life Colorado, King and his wife stayed at the hotel and its look and ambiance are said to be the inspiration for his novel's Overlook Hotel. Guests who have stayed at the hotel have proclaimed feeling spiritual energy of past guests and employees, including the founders of the Stanley Hotel, F.O., and Flora Stanley. Visitors can even take a night spirit tour and walk through a few darkened spaces, which are said to be active with paranormal activity.

9 Bran Castle, Romania

Transylvania, Romania is well known for the legend of Dracula and Bran Castle has become associated with the famous vampire thanks to author Bram Stoker and his vision of Dracula's Castle that is extremely similar to that of Bran. The castle is said to be one of the most haunted places in Transylvania and was a famous residence of Romania's Queen Marie. Folklore, legends and the cruel medieval past the castle has witnessed are enough evidence for people to believe that this castle is indeed haunted. According to the castle's website, in the villages near Bran, there are beliefs in evil spirits and ghosts haunting people while they sleep. However, many people still visit Bran Castle, but we assume many of them don't walk the castle alone.

8 Chateau de Brissac, Maine-et-Loire, France

Chateau de Brissac was built during the 11th century and is haunted by a ghost called the Green Lady. The Green Lady's favorite place to haunt inside the castle is reportedly the tower room of the chapel, where she can be found in her green dress. It's also been said that her moans can be heard throughout the chateau in the early hours of the morning. Besides the haunting, the chateau is an amazing structure in itself, and what first attracts visitor’s attention to it is its sheer height, and at seven stories high, it is the tallest castle in France. The castle has over 200 rooms and most are impressively furnished with dining rooms and bedrooms containing authentic period furnishings. It's an awe-inspiring castle that should be visited with a friend.

7 Akershus Fortress, Oslo, Norway

The Akershus Fortress was built around 1300 and is a stunning medieval castle that was a defensive stronghold for the city of Oslo in Norway. The castle is said to be the most haunted place in the country. During the 18th and 19th century, the fortress was used to house prisoners and during World War II; Nazi's occupied the castle. There are reportedly many ghosts residing in the Akershus Fortress including its most famous ghost dog named Malcanisen that is said to guard the gates of the castle. There is also the ghost of a woman who is often seen inside the castle appearing in a long robe with no facial features. Visitors can attend a ghost tour of the fortress if they so choose too.

6 Chateau Miranda, Celles, Belgium

Chateau Miranda was once a stunning castle located in Belgium, but fell into a state of ruin and despair and now looks like something out of a horror film. Also called Chateau de Noisy, this beautiful castle was built in 1866 and suffered from vandalism and its once ornate interior has fallen apart. However, the castle has become a ghost hunter's paradise ever since it was abandoned in 1991. The castle has become the object of mystery to many people who are attracted to its magnificent architecture that are curious as to what may be waiting for them inside. And although the castle has been abandoned for more than two decades, the clock on the tower is still working.

5 Nagoro, Japan

If you don't think dolls are inherently strange, then check out the Japanese village of Nagoro, which might just change your mind. Life-size dolls populate this unusual village, 350 to be exact after a woman created a doll for each resident that departed the village. The local school is filled with dozens of dolls that represent the children that were once there, and you could spot dolls doing everyday activities like fishing, working in the field and simply sitting along the road starring at you. The inhabitants left the village in search of work, so when Tsukimi Ayano returned home o Nagoro, she found herself lonely and started to create these disturbing looking dolls, starting with a doll looking like her father.

4 Hoia Baciu Forest, Cluj-Napoca, Romania

This Romania forest is considered one of the most haunted forests in the world with visitors reporting the feeling of being watched, overwhelming anxiety, nausea, failing of electronic devices and sightings of ghosts and faces appearing in photographs. The Independent calls the Hoia Baciu Forest the "creepiest forest in Transylvania" after the reported sighting from visitors. The forest gained a ton of attention back in 1968 when military technician Emil Barnea photographed what he claimed was a UFO hovering over "The Clearing" in the forest. Visitors who have camped here explained being woken up by "a very loud hoof noise."

3 Bell Witch Cave, Tennessee

The legend of the Bell Witch of Tennessee is so famous; it's said to be taught in the state's schools. Legend has it that a witch named Kate haunted the Bell family in the 1800s, especially the father, John Bell and was responsible for his death. She was said to have tormented the family for years and some believe she still lingers around the area of their farm which consisted of 320 acres and a cave, that is estimated to be 15 miles deep and even has the face of the Bell Witch along its walls. If you are feeling brave, you can tour the cabin where the Bell family once lived and go into the cave to see if you can spot the witch's face for yourself.

2 Beelitz-Heilstatten Hospital, Berlin, Germany

Any abandoned hospital can make a person cringe, and Beelitz-Heilstatten Hospital in Berlin, Germany is one of those disturbing places that we'd recommend not visiting alone. The hospital was built as a tuberculosis sanatorium in 1898 and was used to treat Nazi's during World War II and is also where a young Adolf Hitler recovered after being wounded in World War I. The large complex was left abandoned and is without a doubt, one of the most hair-raising places on Earth. Visitors can see the hospitals for themselves while walking a 70-foot tall elevated platform and go inside some of the buildings to see what's left of this alarming place.

1 Borley Rectory, England

Borley Rectory is considered the most haunted house in all of England. Local legend states that a monastery was once located on the site of this strange looking house and that something tragic had taken place when a monk and a woman tried to elope. The original tenants of the house claimed to have encountered spirits and became a place marked with increased paranormal activity. However, during the late 1930's the house caught fire and the rectory was taken down. In 1944, the house was demolished, but the legacy of it being the most haunted house in England still remains today.