Despite being considered a thoroughly American sport, basketball's oldest surviving playing field is found in the basement of a Paris YMCA.

An annual festival celebrating Colorado's most famous frozen corpse.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

This eclectic, mosaic-clad home includes a bamboo ping-pong loft and a "Whispermaphones" intercom.

In this truly magical place, rent hasn't been raised since the year 1520.

One of the world's most complex timepieces.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

A stone circle on the slopes of a Caribbean volcano commemorates the leader of an anti-slavery uprising.

The largest self-built castle in the U.S., six decades in the making.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

A spectacular annual festival centers around humans throwing molten iron against a wall at night.

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

Believed to have once stored either human remains or rice wine, thousands of mysterious stone jars lie in ruin.

Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

A natural wonder in south Denmark.

Africa's Venice on stilts.

This tiny hotel perched atop a 50-foot tower really puts things into perspective.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A harrowing trail up a mile-high mountain.

A 63-foot-tall swinging ball hypnotizes passersby, and proves to any remaining doubters that the Earth is spinning.

A massive wintry wall of snow up to 66 feet tall flanks a highway through Japan's mountains.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

This massive underground salt mine now holds a sci-fi theme park in its depths.