Internet rumors, often involving Icelandic singer Bjork, have abounded regarding this isolated outcrop of rock.

This Annapolis home was built by one of the signers of the Declaration of Independence.

Where royalty waits in the height of luxury.

This Late Gothic building that once housed Erasmus is now known as the filming location of "Suspiria."

It's believed a local adventurer spent 50 years living inside this cave.

What else would you call a playground hidden in Alabama's oldest and largest cemetery?

Make sweet music as you walk through this interactive sonic sculpture.

Open since 1690, this former teahouse makes “strength mochi” based on the centuries-old recipe.

A network of ancient tunnels and vaulted chambers with mystical Buddhist reliefs, built for ascetic training.

The Conduit Road Schoolhouse is one of the last one-room schoolhouses remaining in Washington, D.C.

A regular looking rock with an unbelievable history.

A wacky, UFO-shaped house in a suburban neighborhood.

In the middle of this historic colonial city resides a modernist government building known as the UFO.

Part mural and part sculpture, this work of art sits in the middle of the Promenade, as if swimming in a river of asphalt towards the ocean.

A Roman holiday is closer than you think when you use this 1916 staircase inspired by Rome's Piazza di Spagna.

Hundreds of enormous icebergs drift through this waterway every year.

A tiny metropolis resides inside this student housing complex.

A cheeky alleyway window hosts tiny rotating exhibits with outsized charm.

Epicurean and holy traditions converge in what may be the oldest restaurant in Europe.

Dedicated to humankind's achievements in aviation, this Shintō shrine is notable for its Greek-style architecture and collection of aircrafts.

Designed to provide fantastic views of the surrounding rainforest.

The singular ruins of a mysterious lost city.

Though it is hundreds of years old, the intricate details on this 23-foot rock carving of Buddha have been preserved.

Once the overnight home of Mary Queen of Scots.