The design of the Palacio Salvo has been described as "a lighthouse on top of a building."

These spectacular ruins were built by Spanish padres in the 17th century.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

This lush, scenic spot was carved by the turquoise waters of the Radovna.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

This moss-covered, rocky outcropping looks like a mythical beast resting in the water.

Legend says this remote, “bottomless” lake was created by a curse.

One man's love of sea life and art has turned his home into a temple of outsider island art.

A full-scale sculpture of a mermaid and baby grand piano hidden underwater by David Copperfield.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

A stairway to heaven, or to nowhere at all.

3,000 market stands in five former Zeppelin hangars.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The remains of a 19th-century school and living quarters are perched atop a mountain surrounded by a thick tropical forest.

A British general, a suggestive tree, a map of paradise.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

This small shrine dedicated to a fish is believed to hold the secrets to this historic market's founding.

Some of the smallest works of art in existence.

This devil-dancing ceremony now celebrates a miraculous image of the Virgin Mary that appeared to a modern-day Robin Hood in a mineshaft.

Popular tourist destination where witches in dark hats sell dried llama fetuses for good luck.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

A subterranean necropolis blending Egyptian, Hellenic, and Roman traditions and art styles.

The wreck of a World War II cargo ship has become an unintentional time capsule at the bottom of the Red Sea.