In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Eighty million natural history specimens call this gargantuan museum home.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Commemorating the spot where the famous scientist fed his pigeons.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.