A 1,215-foot tunnel transports pedestrians beneath the River Thames.

The sculpture of the deceased cockatoo flops atop its personal plinth.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

The world's largest collection of ship figureheads includes figures from legends and history alike, from Sir Lancelot to Abraham Lincoln.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The author of Alice in Wonderland spent his final years at this whimsical Victorian home.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

Whimsical cookie-themed plaques mark the birthplace of the Fig Newton.

A dead saint, a deadly poison, and a mysterious holy ooze.

Local legend says the remains of Father Christmas lie within the medieval grounds.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.

An abandoned suspension bridge on the Falkland Islands is crumbling into the water.

At high tide this strange footbridge appears to have no purpose whatsoever.

This enormous spiral sculpture looks strangely out of place on the edge of a housing development.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

This fantastical house shaped like a seashell brings aquatic design to architecture.

The United States's largest hand-dug well is topped with a state-of-the-art museum.

A serene temple with stunning stained glass hides in downtown Dallas.

A spiral staircase twists to the top of this unusual Czech lookout tower.

Must form and function forever remain at odds? Not if the Florida Department of Transportation has its way.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.