An Austrian house of bones filled with hundreds of intricately painted skulls.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Once the hottest nightclub in France, Amnesia now lies in ruins after a 2000 bombing.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

Five candy-colored villages on the Italian Riviera.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

This one-time health resort was used by aristocrats around the world.

Medicinal spa created with the discharge from a geothermal energy plant.

Walk 2,300 feet above the ground on the "Troll's Tongue."

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

The fairy tale castle of the "fairy-tale king."

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This legendary city has been a tourist attraction for centuries.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

A spectacular cave and a beguiling lake.

The hallucinogenic center of the ancient world.

The mosaic floor of a 4th-century synagogue features a pagan zodiac wheel alongside traditional images of a Torah ark and menorahs.

Hidden beneath a washing machine in a fake kibbutz, this secret bullet factory has been preserved as a museum.

This "Jewish Sistine Chapel" was designed to reinvigorate Judaism's artistic legacy but was almost lost to misguided restoration.

An ancient quarry rediscovered by a dog and claimed by biblical kings, a German cult, and the Freemasons.

A Biblically notable site over the ruins of an ancient city that is now a protected World Heritage site.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.