A Gothic cathedral created from volcanic rocks.

This forlorn park is the result of a failed investment turned tax dodge.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

An architect transformed this abandoned cement factory into his castle-like workshop.

This former theme park in New York's Adirondack Mountains fell into ruin before being resurrected as a state-run campground

Named after a militant urban guerilla, this famous former squat is a graffiti-covered stronghold of leftist culture.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.

The largest cemetery in the American Southeast is a hidden gem near the heart of Atlanta.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

Five acres of divinely inspired folk art.

A local prank turned town icon.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

Crawl through the hole in the middle of this stone to break off a bad relationship or initiate a good one.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

Church built on the site where the last tsar of Russia and his family were killed.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

This abandoned cemetery has a dark past of bodies buried over bodies.