Conspiracy theories and occult legends surround this mysterious natural rock formation.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

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 Tuscan lake hides a 13th century town that is still visible when the water recedes.

100 massive sculptures in the Hudson River Valley.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

Two thirds of this Montreal neon icon has survived to flash another day.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

A mysterious echo seems to defy the laws of acoustics.

A reversed traffic signal that was once violently misinterpreted as a statement on British-Irish relations.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Hikers can still stroll beneath the long conveyer of this abandoned mining facility hidden in a West Virginia river gorge.

A small storefront museum explores the history and myth of West Virginia's famous urban legend.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

This abandoned amusement park was built on a site with a dark history.

The crash of this great airship signaled the beginning of the end for dirigibles.

Abandoned since the 1950s, the streetcar lane beneath the heavily trafficked bridge lays empty and unused.

A history of tragedy and a pile of eerie stories have contributed to this house's consistent ranking as one of the most haunted places in Ohio.