A field of nothing but boulders which resembles a giant's gravel driveway.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Where America's first doomsday cult awaited the end of the world.

An abandoned stretch of highway, deteriorating next to the operational one.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Mysterious rocks that ring musically when struck.

A toxic ghost town sitting atop a massive coal fire.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The world's largest public collection of PEZ memorabilia.

137 graves holding New England's earliest residents.

This stunning Connecticut mansion is actually just a one-room-deep hoax.

An abandoned gun-funded 19th century utopia.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

A daily replay of the experiment that proved the rotation of the Earth.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This jail which was in service for over a century is now open for curious visitors.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.