Stockholm's famed ghost train is now on display at an art park in northern Sweden.

A Frankenstein blend of science and art allows one tree to produce 40 different types of stone fruit.

This abandoned villa of makeshift buildings was once the home of dancer Elis Sinistö.

This mesmerizing medieval monastery-cave complex sits thousands of feet above ground overlooking a valley.

Old vessels have been transformed into artistic canvases in this unusual cemetery.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

A short hike into the mountainside forest reveals a decaying 1890s town.

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

An abandoned relic of the city's failed experiment with below ground transit.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

A Beaux-Arts triumph set to become Ford's innovation campus

If astronomy had a ghost, it would look like this observatory.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

You can row a boat through this ancient underground reservoir.

This museum dedicated to divination also honors a local 10th-century prophetess.

These legendary stone steps were once used to haul coffins up the rockface.

Mysterious heaps of stones dot these otherworldly woods.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

The longest stone bridge in England has an impressive history that dates back over 700 years.