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            Structures and Buildings

            Machu Picchu Ancient Structures Wonder of the World
            Machu Picchu, located high in the Andes, was voted one of the
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            Since at least the building of G?bekli Tepe 11,000 years ago, humans everywhere have built structures of size and grandeur: from the Cahokia Mounds to Chichen Itza, from Great Zimbabwe to?Angkor Wat, from St. Basil's Cathedral to Petra to the Sydney Opera House. These structures and monuments stand?testament?to human ingenuity and culture.?Learn about the history of major structures, endangered places, famous buildings, bridges and landmarks, including the Seven Wonders and more.

            The World's Biggest, Tallest, and?Longest

            Select structures have the proud distinction of being the largest of their kind, whether by necessity (as in the case of some dams) or by design.?In terms of length, height, volume, or area, these architectural projects are the best. Read on to learn more about the structures that rise above the rest (physically), and to learn a bit more about some of those that did in the past.

            World's Highest Dams

            World's Largest Dams

            World's Largest Hydroelectric Plants

            World's Tallest Towers

            World's Tallest Skyscrapers: A Brief History

            Top Ten Tallest Completed Building Projects

            World's Tallest Buildings

            Tallest Buildings in the World Slideshow

            Tallest Buildings Timeline

            Skyscraper History

            Skyscraper Facts

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            America's Monuments and Landmarks

            The United States is a rather young country, but that hasn't hampered the construction of its many remarkable monuments. From the completion of major projects like the Gateway Arch in St. Louis (the world's tallest manmade monument) and?the Empire State Building, to the many famous memorials like the Lincoln Memorial in D.C., the United States has plenty to wonder at. Learn more about some of the highlights, and about the risks some of these sites face.?

            Slideshow: Landmarks of Washington, D.C.

            Slideshow: Statues of Washington, D.C.

            Longest U.S. Suspension Bridges

            World Trade Center History

            Tallest Buildings in the United States

            America's Most Endangered Places 2015

            America's Most Endangered Places 2014

            America's Favorite Structures

            U.S. Historical Monuments

            The Golden Gate Bridge

            The Pentagon

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            Other Famous Landmarks

            There's more to a meaningful monument than just its size. Some structures are remembered for their historical importance, the unique circumstances of their construction, or their sheer beauty. Many of these are recognized by UNESCO?as World Heritage Sites, or are selected?by local culture groups and tourism boards.

            Some World-Famous Cathedrals

            Notable Tunnels

            Famous Ship Canals and Waterways

            Famous Buildings and Structures

            Notable Modern Bridges

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            The Seven Wonders of the World

            The most famous selection of these impressive sites is the Seven Wonders of the World named by Philo of Byzantium?in the second?century BCE. After campaigns of Alexander the Great, Greek travelers began wandering and writing down the most impressive sights.?Philo's contemporaries also often cited the Walls of Babylon and the Ishtar Gate. All seven wonders only existed at the same time for sixty years before some of them began collapsing, and today the Great Pyramid of Giza is the only one that survives.??

            Since then, many people have adopted the "Seven Wonders" format to make their own lists of remarkable structures. Some of the most famous are the Seven Wonders of the Modern World by the?American Society of Civil Engineers, or the Seven Wonders of the World from the New7Wonders Foundation.??

            The Seven Wonders of the Ancient World

            The Seven Wonders of the Modern World

            7 Wonders of the Modern World Slideshow?

            7 Wonders of the Ancient World Slideshow

            Seven New Wonders

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            Miscellaneous

            In addition to our?other info, be sure to check out these links to learn?more about the history of architecture, and to see what other relevant questions our editors have answered.?

            Encyclopedia: Architecture

            Notable Architects

            What is the Statue of Zeus at Olympia?

            Highest Airport in the World

            The Great Wall: visible from space?

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            Brewer's: World
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