In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

A Victorian mansion, painstakingly reproduced to appear just as the the Munster's family home did on TV.

A sleepy little town that had the greatest landslide in North American history fall on it.

Whimsical artist house in the New Jersey woods.

This seven story Japanese love hotel now stands in ruins.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

Cold storage for agricultural biodiversity.

A Turkish ghost town abandoned in a population exchange with Greece.

Resonating tubes make music from highway overpass.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

A book bound in the skin of an infamous criminal, along with countless other specimens.

This decommissioned DC-3 now forever points into the oncoming wind.

A military museum and library dedicated to the citizen soldier.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

This small chapel is built of human bones and decorated with a golden skeleton.

Towering basalt columns, a creation of fire and ice.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

One of the best collections of wax anatomical models in the world.

Abandoned concert venue legendary for its rock counterculture.