The ocean covers more than 70 percent of the Earth's surface and stretches so far down, there are still countless things yet to be explored or understood. However, the discoveries that have been made by divers on the ocean floor have shown that not only does our planet have a diverse amount of bizarre sea creatures, but an astonishing past including sunken lost cities and shipwrecks filled with gold.

Some of the most incredible discoveries found underwater have luckily been photographed, proving their authenticity. Sunken ships like the famous Titanic have been photographed deteriorating at a rapid speed with scientists believing it'll vanish by 2030. Divers have found lost ancient cities deep in the waters of China, India, and Egypt with sculptures and statues in marvelous conditions.

There is also the plethora of sea creatures that only live deep beneath the ocean's surface that continue to astound scientists. How is a spider able to live underwater its entire life and what is the translucent Sea Angel?

Here are 20 strange but real photos taken underwater that have marveled people all over the world.

20 Apollo 11 Mission Engines In The Atlantic Ocean

One of the most incredible discoveries found on the ocean floor is the engines from the Saturn V rocket that blasted the Apollo 11 moon landing mission into orbit, according to Popular Mechanics. The rockets were found 14,000 feet below the ocean's surface off the coast of Florida and had been lying there for more than 40 years. However, billionaire Amazon.com founder Jeff Bezo's and his team successfully recovered the artifacts that are now on display.

19 A Sunken City In India

Many Indians believe that the lost city of Lord Krishna is sitting in ruins in India's Gulf of Cambay. These spectacular ruins are located off the coast of modern-day Dwarka, one of the oldest cities in India. "As the story goes, Lord Krishna had a beautiful and prosperous city built, with 70,000 palaces made of gold, silver, and other precious metals. It was his death that supposedly sent Dwarka sinking into the sea," Web Urbanist writes.

18 An Undersea River In The Black Sea

As odd as it may sound, there is a river flowing at the bottom of The Black Sea that resembles a river a person would typically see on land. Not only is there a river, but there are also trees, leaves, riverbanks, and waterfalls. If it was on land, this river would be the world's sixth largest in terms of the volume of water flowing through it, making it ten times bigger than Europe's biggest river, the Rhine, reports Message to Eagle.

17 The Sea Angel In The Frigid Waters Of The Arctic

It's easy to see how these underwater species earned their name thanks to the way they swim gracefully through the ocean depths and their translucent bodies. According to Scuba Diving Resource, the Sea Angel is actually a sea slug that does not grow more than 5 cm in length. On top of their heads are projections that are sensory organs and these aren't wings that help the Sea Angel swim but their feet!

16 A Diver Exploring A Gigantic Sunken Ship

There are an estimated 3 million shipwrecks at the bottom of the ocean and we have only found less than one percent of all the world's shipwrecks, according to World Atlas. It's also been reported that an estimated $60 billion worth of treasure is still lying on the ocean floor waiting to be found, but because diving operations are so costly and exhausting, these treasures could be sitting in the ocean's depths for a long time.

15 The Size Of A Lion's Mane Jellyfish

The Lion's Mane Jellyfish got its name from the long, hair-like tentacles hanging from its bell-shaped body that can reach 120 feet long, possibly beating out the blue whale in size. According to Oceana, this jellyfish's tentacles are equipped with a poison that stun prey, but humans have little to fear from this jelly if they give it enough space and allow it to go about its business.

14 Diving Arachnids That Can Breathe Underwater

According to Science Daily, there are spiders that spend their entire lives underwater, only making their way up to the surface once a day to replenish their diving bell air supply. These small creatures create a net of silk in vegetation beneath the surface and fill it with air carried on its abdomen. These spiders even lay their eggs in these diving bells which act like a gill sucking oxygen from the water.

13 The World's Oldest Intact Shipwreck In The Black Sea

A ship found in The Black Sea is being hailed as the world's oldest known intact shipwreck. According to BBC, this Greek merchant ship dates back to more than 2,400 years and was found laying on its side off the Bulgarian coast. The rudder, rowing benches and the contents of its hold all still remain intact. The ship has remained in such good condition because the water is free of oxygen, lying more than 2,000 meters below the surface.

12 The Pink-See Through Fantasia With Eerily Translucent Skin

One of the oddest species found in the ocean is the Pink See-Through Fantasia that is actually a sea cucumber. What makes this sea creature so unique is its translucent skin, making its internal organs visible for anyone that wants to see how these species digest their meals. According to The Telegraph, these eerie creatures are only found in the Celebes Sea, between the Philippines and Indonesia, 2,500 meters deep.

11 The Titanic Deteriorating

The Titanic sank in 1912 on its maiden voyage to New York City after it was struck by an iceberg about 400 miles from Newfoundland. The wreckage wasn't found until 1985, and since then, dozens of submarines have gone down to explore it. Sadly, this iconic ship is deteriorating and scientists believe that by 2030, the entire shipwreck could vanish due to the bacteria eating away at the ship's metal, according to Business Insider.

10 The Ginnie Cavern In Florida

One of the most jaw-dropping undersea treasures is an underwater cave in Florida that even inexperienced divers can explore. The Ginnie Cavern's main attraction is its ballroom which contains many unusual geological formations and extremely light and highly reflective limestone, that can also be found throughout the cave, according to Ginnie Springs Outdoors. Divers will get breathtaking views of this natural beauty.

9 What's Left Of Cleopatra's Palace In Egypt

A plethora of ancient artifacts was found at the bottom of the Mediterranean Sea in Egypt's capital of Alexandria that can possibly give us a glimpse of the lives of ancient rulers like Cleopatra. According to ABC News, divers have located royal quarters that include a palace and temple complex where Cleopatra is said to have reigned as well as 20,000 objects dating back to 25 BC.

8 China's Atlantis, Lion City

A once-bustling city in China known as Lion City is now sitting at the bottom of Qiandao Lake. This thriving city was purposely flooded in order to design and build a hydroelectric station and dam, now known as Xin'an Dam and make way for a man-made lake. To this day, the remains of Lion City are in pristine condition with some of the statues and sculptures roughly 1,300 years old, according to Ancient-Origins.

7 Diving Between Two Tectonic Plates In Iceland

In Iceland, divers can experience swimming or snorkeling directly in a crack between two tectonic plates known as Silfra. According to Dive.Is, Silfra is a fissure between the North American and Eurasian tectonic plates in Thingvellir National Park. This rift was formed by an earthquake in 1789. The diving site at Silfra is right where two continents meet and drift apart every 2 cm per year, making it the only place in the world where you can dive between these two plates.

6 The Ice Finger of Doom At The Bottom Of The Ocean

A natural phenomenon that occurs at the bottom of the ocean, known as Brinicles, or their more common term, the ice finger of death is caused when sea ice cracks and leaks out the saline water to the open ocean. It occurs in polar regions like beneath the Antarctic ice, under blocks of floating sea ice. With the brine being heavier than the water surrounding it, it sinks to the ocean floor and grows downwards, even catching sea creatures in its path, according to Earth Archives.

5 A Locomotive Graveyard Off The Coast Of New Jersey

Several fifteen-ton locomotives were found in unusually good condition off the coast of New Jersey that dates back to the 1850s. According to The Travel, there is no real explanation as to why these massive trains ended up nearly one hundred feet below the ocean but researchers believe they were pushed off ships to prevent them from sinking.

4 A Giant Isopod

One of the most bizarre-looking sea creatures living in the depth of the ocean is the Giant Isopod. These creatures can grow to a length of 16 inches, making them one of the largest members of the crustacean family. According to Sea Sky, the Giant Isopod is found in most oceans of the world, spending its time scavenging the deep seafloor and eating whatever just so happens to fall from above.

3 A Sunken Boat At The Bottom Of The Arctic Ocean

This incredible photo shows a sunken Brazilian ship in Antarctica that's just lurking under the water's surface. According to Daily Mail, images show the eerie remains of the 76-foot long Mar Sem Fim, a Brazilian research boat trapped under the ice after it lost to a battle of winds more than 60 miles per hour. Luckily, the crew abroad the ship were able to get out and radio for help.

2 Discovery Of Sunken Spanish Galleon San Jose In Colombia

According to The Travel, this Spanish ship sank during a battle off the coast of Cartagena, Colombia in 1708 and carried gold, silver, and emeralds worth about $17 million. The discovery of the Galleon San Jose is said to be the most financially valuable discovery in history but has been the result of a constant feud between the founders of the ship and the Colombian government over the rightful owners of the treasures worth millions of dollars.

1 A Stonehenge In Lake Michigan

A Stonehenge-like structure was found underneath the waters of Lake Michigan which was a potentially-prehistoric surprise to researchers who were in the waters looking for old boat wrecks in 2007. According to NBC Chicago, a series of stones arranged in a circle 40 feet below the surface of Lake Michigan resembles the famous prehistoric monument in the U.K. One stone outside of the circle even seems to have a carving on it that looks like a mastodon.