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

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Eighty million natural history specimens call this gargantuan museum home.

The blinking light atop the iconic landmark has been sending secret messages for decades.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

This decommissioned DC-3 now forever points into the oncoming wind.

One of the largest underground systems runs under Canada's largest urban center.

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

The largest greenhouse in the world is home to over one million types of plants.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A serpentine highway twists and turns over the treacherous Norwegian Sea.

Pompeii's less famous neighbor is still revealing her secrets.

Rebuilt remains of a temple to Roman god Mithras.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Paris' linguistic guide to the international language of, yes, love.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Bomb tests and sheep ranchers share the world's largest military land base.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

The longest fence in the world stretches over 3,000 miles to keep the dingoes out.