Top 10 Structures

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Grand Place
Brussels, Belgium

10. Grand Place, Belgium

The Grand Place or Grote Markt is the central square of Brussels. It is surrounded by guildhalls, the city's Town Hall, and the Breadhouse. The square is the most important tourist destination and most memorable landmark in Brussels. It measures 68 by 110 meters, and it is a UNESCO World Heritage Site. In the 10th century, Charles, Duke of Lower Lorraine constructed a fort on Saint-Géry Island, the furthest inland point at which the Senne river was still navigable. This was the seed of what would become Brussels. By the end of the 11th century, an open-air marketplace was set up on a dried-up marsh near the fort that was surrounded by sandbanks. The market was called the Nedermerckt, or Lower Market.

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Gran Telescopio Canarias
Canary Islands, Spain

9. Gran Telescopio Canarias, Spain

The Gran Telescopio Canarias (meaning Canaries Great Telescope), also known as GranTeCan or GTC, is a 10.4 m (410 in) reflecting telescope undertaking commissioning observations at the Roque de los Muchachos Observatory on the island of La Palma, in the Canary Islands in Spain, as of July 2009.

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Bulgarian National Historical Museum
Sofia, Bulgaria

8. Bulgarian National Historical Museum, Bulgaria

The National Historical Museum (Национален исторически музей) in Sofia is Bulgaria's largest museum. It was founded on 5 May 1973 and its first representative exposition was opened in 1984 to commemorate 1300 years of Bulgarian history. The museum was moved to a former governmental residence in 2000 and currently stores and owns over 650,000 objects connected to archaeology, fine arts, history and ethnography, although only 10% of them are permanently exhibited.

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Welland Viaduct
Northamptonshire, England

7. Welland Viaduct, England

Welland Viaduct, also known as Harringworth Viaduct and Seaton Viaduct, is a railway viaduct which crosses the valley of the River Welland between Harringworth in Northamptonshire and Seaton in Rutland, England. It is 1,166 km long and has 82 arches, each of which has a 12 m span. It was completed in around 1878 and is the longest masonry viaduct across a valley in Britain.

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Glenfinnan Viaduct
Highlands, Scotland

6. Glenfinnan Viaduct, Scotland

Glenfinnan Viaduct is a railway viaduct on the West Highland Line in Glenfinnan, Lochaber, Highland, Scotland. It was built between July 1897 and October 1898 at the cost of £18,904. Located at the top of Loch Shiel in the West Highlands of Scotland, the viaduct overlooks the Glenfinnan Monument and the waters of Loch Shiel. The 21-arch single track viaduct was one of the largest engineering undertakings using concrete without reinforcing when it was built by Sir Robert McAlpine.

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Piazza del Campo
Siena, Italy

5. Piazza del Campo, Italy

Piazza del Campo is the principal public space of the historic center of Siena, Tuscany, Italy and is regarded as one of Europe's greatest medieval squares. It is renowned worldwide for its beauty and architectural integrity. The Palazzo Pubblico and its Torre del Mangia, as well as various palazzi signorili surround the shell-shaped piazza. At the northwest edge is the Fonte Gaia. The twice-a-year horse-race, Palio di Siena, is held around the edges of the piazza.

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St. Kliment Ohridski Base
Livingston Island, Antarctica

4. St. Kliment Ohridski Base, Antarctica

St. Kliment Ohridski Base is a Bulgarian Antarctic base on Livingston Island in the South Shetland Islands. The base, originally known as Sofia University Refuge, was named in 1993 /for St. Kliment of Ohrid (840-916), prominent Bulgarian scholar./

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Sphinx Observatory
Jungfraujoch, Switzerland

3. Sphinx Observatory, Switzerland

The Sphinx Observatory is an astronomical observatory located on Jungfraujoch in Switzerland. The mountain top has been tunneled to fit an elevator which ascends to the observatory from the Jungfraujoch train station, the highest such rail station in Europe, and a nearby Ice Palace. Adjacent to the observatory is an open viewing deck accessible to the public. The deck offers views of the Jungfrau, Monch, and Eiger peaks, all within a few kilometres.

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Sydney Opera House
Sydney, Australia

2. Sydney Opera House, Australia

The Sydney Opera House is a multi-venue performing arts centre in Sydney, New South Wales, Australia. It was conceived and largely built by Danish architect Jørn Utzon, opening in 1973 after a long gestation that had begun with his competition-winning design in 1957. The Sydney Opera House was made a UNESCO World Heritage Site on 28 June 2007.

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Rozhen Observatory
Rhodope Mountains, Bulgaria

1. Rozhen Observatory, Bulgaria

Rozhen Observatory is a Bulgarian astronomical observatory, located 90 kilometers south of the city of Plovdiv, Bulgaria. The nearest town, Chepelare, is 15 kilometers away. It is owned and operated by the Institute of Astronomy of the Bulgarian Academy of Sciences.

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