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Iconic skyscraper symbolizing America's economic power, completed in 1931.

Built in 1889 for the Paris World's Fair, emblematic of France and a monumental feat of engineering.

Series of fortifications made of stone, brick, and other materials, built as early as 7th century BC.

Mausoleum in Agra, India, built in 1643 by Emperor Shah Jahan in memory of his wife.

Amphitheater in Rome, Italy, built in AD 80, used for gladiatorial contests and public spectacles.

Multi-venue performing arts center in Sydney, Australia, opened in 1973 and known for its unique architecture.

Skyscraper in Dubai, United Arab Emirates, standing as the tallest structure in the world since 2010.

Monument on Liberty Island in New York Harbor, gifted by France in 1886, symbolizing freedom and democracy.

Nickname for the Great Bell of the clock at the north end of the Palace of Westminster in London, built in 1859.

15th-century Inca citadel located in the Eastern Cordillera of southern Peru, built around 1450.

Historical and archaeological city in southern Jordan, famous for its rock-cut architecture, established as early as 312 BC.

Freestanding bell tower of the cathedral of the Italian city of Pisa, construction began in 1173 and the tilt due to unstable foundation.

Official residence and workplace of the President of the United States, built between 1792 and 1800.

Large, mainly Gothic abbey church in the City of Westminster, London, built in 960 AD.

Historic fortified complex at the heart of Moscow, includes 5 palaces and 4 cathedrals, built from 1482 to 1495.

Palace and fortress complex located in Granada, Andalusia, Spain, built in mid-13th century by the Nasrid sultans.

House designed by architect Frank Lloyd Wright in 1935 in southwest Pennsylvania, a masterpiece of organic architecture.

World's largest art museum and a historic monument in Paris, France, originally built as a fortress in the late 12th century.

18th-century neoclassical monument in Berlin, Germany, built in 1791 as a symbol of peace.

Observation tower in Seattle, Washington, built for the 1962 World's Fair, an icon of the Pacific Northwest.

19th-century Romanesque Revival palace on a rugged hill in Bavaria, Germany, commissioned by Ludwig II of Bavaria in 1869.

Renaissance era church in Vatican City, completed in 1626. It is the most renowned work of Renaissance architecture.

Island commune in Normandy, France, with a monastery built from the 8th to the 18th century, representing the feudal society.

Former Greek Orthodox Christian patriarchal cathedral, later an Ottoman imperial mosque and now a museum, in Istanbul, Turkey, completed in AD 537.