A formerly opulent Italian village is now a crumbling ghost town that no one really knows what to do with.

This 17th-century Bhutanese monastery is ensconced in Buddhist legend.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

In Faroese legend, this sinister horse-shaped beast lures unsuspecting passersby only to drown them in the lake.

A hidden treasure of an abandoned city lies deep in the jungles of Campeche, Mexico.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

Every equinox this Maya pyramid puts on a spooky ancient light show.

These azure waters were thought to lead to the Mayan Underworld.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Three sinkholes filled with warm, crystal-clear water reached by a horse-driven cart on an old train track through the jungle.

A forest park outside Tallinn full of architectural and artistic curiosities.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

Fantastic views and thousands of love locks.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

An ancient necropolis of magnificent tombs.

A crumbling ghost town with prime views of the dam that doomed it.

For nearly 2,000 years this church has been waging war on local snakes by importing cats.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

Sex curse discovered on ancient tablet in Cyprus.

This museum in a shuttered train station remembers the island's forgotten rail system.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.