A Belgian self-built tower inspired by the Bible and ancient civilizations.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Shop the world's largest number of ice cream flavors, ranging from delightful to downright bizarre.

Colorful boxes placed over the dead are left to rot and crumble.

Handsomely crafted representations of our round planet.

Abandoned railway line circling the city of Paris.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Charles Babbage's proto-computer, painstakingly brought to life.

Flaming barrels of tar race through these village streets on Bonfire Night, a tradition that dates back centuries.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

Death road of Bolivia.

A 16th-century horror show built in a lovely Italian garden.

The largest known meteorite on Earth was too big to move.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

A seemingly endless landscape of pure salt stretches far across Bolivia.

A toxic lake near a volcanic caldera that is home to flamingos and other life.

Once home to over 8,000 exiled Hawaiians suffering from Hansen's Disease.

A gateway to a mysterious network of underground tunnels.

Half of a waterfall goes into the river while the other half seems to disappear.

This huge pile of volcanic boulders hides a stunning network of secret grottoes.

Two stunning 17th-century libraries and a cabinet of curiosities.

In this coastal town, the time-honored tradition of reenacting the struggle between the Christians and Moors includes the arrival of the Moorish fleet.