Folklore says this medieval fortress was plopped atop a portal to hell to trap the demons below.

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

A deadly ancient portal to the underworld.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

Every Easter, a small Sicilian town builds a stunning cathedral out of bread.

A beautiful, creepy 19th-century castle stands incongruous in rural Vermont.

An engraved stone in a village church claims to be the grave of a minuscule folk legend.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

The abandoned club hides in the hills of Ibiza.

When this test site was abandoned, they didn't even bother to take the rocket with them.

An abandoned textile factory on the "island of crows" was home to Estonia's first workers' strike.

This entire town moved to a safe location after it was devastated by an earthquake, but the remains of the original town are still around.

Azerbaijani ghost town, decaying after a war left it an armed forces buffer zone.

This abandoned fishing settlement may well be the greenest village in the world.

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

These Stalin-era industrial 'death traps' hang lifeless above the city

This rusting remnant of the local herring industry is being given a second life.

There was a top secret plan during World War II to seal a group of soldiers inside the rock.

The world's largest church atop a political fault line.

The souls of the dead have made these Ghanese crocodiles shockingly docile.

Terrifically morbid cemetary and site of famous Paracelsus' grave.

Villagers have recycled bomber fuel tanks from the Vietnam War and turned them into very, very strong boats.

Visit the WWII bunker where the British won the battle for the skies.

A 550-square-meter micro-nation off the coast of Britain.