The remains of this ancient fortress atop a manmade hill look as though they were built into a volcano.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

Vikings and Evangelicals have both had a hand in this replica medieval church.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

One of the largest caverns in the world has a maw large enough to stack cathedrals in.

This ancient burial site is believed to be one of the first earthquake-protected structures in the world.

This historic Victorian hotel has a scandalous history of affairs and murder.

Adobe ruins punctuate the beauty of an 800 foot canyon carved by the Canadian River.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

Despite finally receiving electricity in 1970, this tiny town is now deserted.

These aggressively sustainable art homes look like something out of 1970's science fiction.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

Underneath the city that invented pilsners are a series of historic tunnels that have been storing beer for centuries.

The simple log cabin of a famed loner and naturalist stands preserved as a symbol of the ultimate DIY lifestyle.

This sawtooth mountain range still bears the strangely lovely marks of its history as a medieval quarry.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

This hidden natural fountain issues forth a steady supply of supposedly healing water that tastes like rotten eggs.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Staves, storm-calling, and of course, necropants.