The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

At almost 1,000 years old, this is the oldest known door in all of Britain.

It holds a fabulously designed tribute to astronomer Edmond Halley.

Commemorating the lives of a renowned humorist and a famed aviator who died in a plane crash in northern Alaska.

A mechanical clock built in 1914, with a rotation of 12 historical figures on its face.

This tiny, triangular block has held the world record since 1964.

The only airport with a people mover system designed by Walt Disney Imagineering.

This historic fort spans more the 300 years.

This little sun pays homage to a massive gate that once stood at this location.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

Archaeologists believe this panel of petroglyphs depicting descending sheep and other figures in Glen Canyon are 3,000 to 6,000 years old.

Artifacts from a battleship sunk at Pearl Harbor displayed in the Capitol building of its namesake.

After the oysters have been shucked, and the restaurant's been shuttered, the terrazzo sidewalk from the 1940s is all that remains.

In 1857, the Mardi Gras parade tradition began at this intersection.

A unique post-modern public space in the middle of the Warehouse District in New Orleans.

This lonesome Monterey cypress has survived centuries of wind, salt, and at least one attempt at arson.

The world's longest continuously running show has played at this small West End theater since 1974.

This mesmerizing and surreal landscape features intricate patterns of white and red sandstone.

A sobering account of the vibrant multicultural neighborhood that was destroyed under apartheid.

The original goat tower, the one that started it all.

The South African dialect's complex history is immortalized in stone, in one of the world's only monuments dedicated to a language.

Mass grave of 50 unidentified French Soldiers who died at the Siege of Yorktown, 1781, that gave victory to the American Revolution.

A 19th-century relic of timekeeping.

This magnificent natural sandstone bridge is one of the largest in the world and is an iconic symbol for Lake Powell.