Europe has some of the most diverse architectural styles in the world. Impressive historical structures, resorts, as well as ancient castles are among the many UNESCO World Heritage Sites in the continent. In Europe, one can hardly turn a corner without coming across a magnificent monument—indeed, it is a veritable treasure trove of spectacular architectural marvels. Summarized below are the must-visit impressive monuments in Europe.

10 The Atomium

The Atomium, designed by Andre and Jean Polak, is located on Pl. de l'Atomium in Brussels, Belgium. The 102-meter-high monument was built in 1957 and is only a 3-minute walk from Mini-Europe. Aside from its historical significance, the monument is also a cultural site, with over half of its space dedicated to exhibitions of Belgian and digital arts. It is now one of Europe's most popular tourist destinations, attracting over 600,000 visitors each year. It is open daily from 10:00 a.m. to 6:00 p.m. and costs $19 per person per ticker.

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9 The Cristo Rei

The Cristo Rei, known as one of Lisbon's most distinctive monuments, towers over the south of Tejo Estuary. The monument represents Christ blessing the city with his arms spread. It is the tallest point in the region, at 75 meters tall. The monument is surrounded by gardens and structures, and admission to the grounds is free. Admission to the observation platforms, on the other hand, ranges from $3 to $6 per person. It is also open daily from 9:30 a.m. to 7:00 p.m. and may be seen from the suspension bridge Ponte 25 de Abril.

8 Pena Palace

The Pena Palace is located on the summit of the hill of Sintra, Estrada da Pena. It was designed by Nicolau Pires, Wilhelm Ludwig von Eschwege, and Ferdinand II of Portugal in the Romanesque Revival and Neo-Manueline architectural styles. In addition, the monument is recognized as a UNESCO World Heritage Site. The President of the Portuguese Republic and other government officials use the palace as a venue for events. It is open every day from 10:00 a.m. to 6:00 p.m. and costs $8 per person to visit.

7 The Church of Hallgrimur

The Church of Hallgrimur, which rises 244 feet above Iceland's capital city was designed by Gujón Samuelsson in 1945. However, he died in 1950, leaving architects Garar Halldórsson and Hörur Bjarnason to finish what the former architect had started. The amazing natural beauty of the country inspired the church's architectural design. Furthermore, while the church is free to visit, it operates on a seasonal schedule, so potential tourists should check beforehand to see if a visit to the church is possible.

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6 La Sagrada Familia

The unfinished La Sagrada Familia, which stands 172 meters tall in Barcelona, Spain, towers above the city. The basilica was built in 1882, and it was designated as a UNESCO World Heritage Site in 1984 due to its unique architectural design and Antoni Gaudi's Spanish gothic architecture. Despite being unfinished, the church began its operations in 2010 and continues to operate today. It is open every day from 9:00 a.m. to 6:00 p.m. and costs $30 per person to enter.

5 Pisa Tower

The Pisa Tower, which is located in Piazza del Duomo in Pisa, Italy, is the city's most famous structure. The leaning tower of Pisa, with a height of 57 meters and a Romanesque architectural style, was designed by architects Guglielmo and Diotisalvi in 1173. The tower has eight stories, however, after the first three, it became apparent that the tower is tilting, which is due to the disproportionate settling of the tower's foundation. It is also open daily from 9:00 a.m. to 6:00 p.m., with a $22 admission cost per person.

4 Facteur Cheval Palace

Located at 8 Rue du Palais, 26390 Hauterives, France, is the Facteur Cheval Palace or Postman Cheval’s Ideal Palace. The luxurious palace was created by Ferdinand Cheval using stones and has been remarkable after the 33 years of construction which began in 1879 until 1912. Cheval was mostly inspired by nature and the postcards he delivered. Carvings of numerous landmarks, mythological creatures, and animals from around the world can be found throughout the structure. The palace is open daily from 9:30 AM to 5:30 PM.

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3 Royal Pavilion

Situated in 4/5 Pavilion Buildings, Brighton BN1 1EE, United Kingdom, is the Royal Pavilion. It was designed by Josh Nash, William Porden, Henry Holland, and Augustus Charles Pugin in a blend of Chinese, Gothic, and Indo-Saracenic architectural styles and is owned by Brighton & Hove City Council. The pavilion was built in 1787 and opened to the public in 1823, serving as a hospital during World War I. It is open daily from 10:00 a.m. to 5:15 p.m. with a $21 admission price.

2 The Bubbles Palace

The Bubbles Palace, located on a steep hillside in the Massif de L'Esterel volcanic range in southern France, facing the Mediterranean Sea was created by Antii Lovag. He intended to create a residence that resembled humanity's oldest cave shelters. It was constructed from 1975 through 1989 and is around 13,000 square feet in size, with several rooms, three swimming pools, and numerous gardens, including an amphitheater. The castle has also held a variety of parties and events, including the Dior fashion show and the 40th Birthday of James Bond.

1 The Forest Spiral

The Darmstadt Building Association contracted Friedensreich Hundertwasser to design a 105-unit housing complex in Darmstadt's Bürgerpark neighborhood. The building has twelve stories and 105 flats, as well as a cafe that offers breathtaking views, a bar, and a parking garage. It reaches a height of 41 meters and features a unique accent in the form of a forested spiral. Hundertwasser envisioned the facades as an emblem for the earth's layers, or the silt that had collected over millennia.

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