An isolated village literally built into the crevices and rock formations of a mountain.

A series of modernist treehouse hotel rooms grace the outskirts of an Arctic forest.

The home of the Dead Sea Scrolls is an abstract modernist dream.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

Internationally recognized group that works to protect the wolf and educate the public about its plight.

Less a museum than a bizarre fantasy world created by artists and engineers.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

The people murdered during a 17th-century Norwegian witch hunt have been honored with a pair of stark, modern installations.

A moving memorial to the fallen and missing from WWI trenches.

A beautiful and classically designed villa, with an hourly infestation of monsters.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Historic medieval fortified city in southwest France.

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

Walk in the footsteps of the gods and straddle two tectonic plates.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.