Buildings - HISTORY

This video clip from "Life After People" looks at the decay and eventual destruction that would happen to buildings and structures from subway tunnels to the Sears Tower if humans were to suddenly vanish from the planet.

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Chicago's Willis Tower, formerly named the Sears Tower, was the tallest building in North America. What does it take to maintain and operate this massive skyscraper?

Architects have overcome challenging terrain to build some of the world's greatest structures.

The Eiffel Tower was originally not well-liked by Parisians, but over time, it has become an iconic symbol of the city.

When it was completed in 1931, New York's Empire State building was the world's tallest skyscraper. What was the driving force behind the design of this massive structure?

In this Lost Worlds video, brought to you by the History Channel, learn about man's ability to come up with creative solutions to move stone throughout history. Watch as this video takes us from Egypt to Greece to Jerusalem showing us different solutions throughout history for constructing giant structures like obelisks and temples.

Workers carved the 700-ton Obelisks of Luxor from a single piece of red granite.

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