The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

Explore the atmospheric ruins of an abandoned convent in the dense forests of Mexico's first national park.

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

An eccentric German artist built this weird and wondrous castle packed with shocking sculptures and alien art.

This trio of Dominican cave lakes comprise a colorful biosphere of natural life.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

A hidden beach at the end of a tunnel of mangrove trees.

A lone gunner's station is all that remains of a replica Spanish Fort in Florida.

Hundreds of skulls and bones at the largest skeleton museum in the country.

A luxuriant botanical garden below sea level.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

A swing to dangle you off the very edge.

An isolated dive site teeming with cnidarians.

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

Every autumn, this hillside is ablaze with red summer cypress.

The abandoned ruins of a beautiful medieval castle just outside Barcelona.

What was once England's second-richest abbey is now a haunting ruin.

An abandoned horror film set sits eerily along a highway through Hollywood's "door to the desert."

The remains of a magnificent medieval fortress that was the capital of a vast empire.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

A beautiful 62-acre Catholic shrine and botanical garden.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A heavenly experience, right here on Terra Firma.