These medieval monastery ruins are surprisingly overlooked by most tourists.

The ruins of New Zealand's largest classical-style church.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The world's only three-story rotary jail is now a museum to a bizarre trend in prison design.

What looks like a crashed Zeppelin is actually a bright, airy reading room perched atop a modern museum.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

One North Dakota man's vast collection of rare rocks, polished orbs, and geological wonders.

This remote eatery and museum is preserved as a time capsule of a small Icelandic fishing town.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

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

An isolated, rusty phone booth commemorates Iceland's first international telegraph cable.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

Supposedly this Ethiopian chapel holds the Ark of the Covenant, guarded by virgins who cannot leave the building.

This spectacular bridge supported by two gigantic hands looks like something out of a fantasy universe.

What appears to be an ordinary bridge is actually a rare aqueduct.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

Austria's ultra-modern art museum looks like Cthulhu's giant alien heart.

Resting in the middle of an Austrian river, this sci-fi "island" lets people cross in neon style.

The world's largest historic armory was established by independent citizens to defend themselves from the wars of larger forces.

Double spiral staircases are not unheard of, but they are very rare.

One of the only places where Earth’s mantle lies above water.

The fragmented remains of a massive public bath connected to the city's water supply.