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

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

Outsider art meets paleontology at this roadside reptile repository.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Nothing says indulgence like a 1,500-pound chocolate castle.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

The 25th President's marble casket can be visited in this classical Ohio tomb.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

A rare view of a preserved Victorian science museum.

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

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

It marks the spooky spot where the bodies of two young boys were found in the 19th century.

America's first serial killer rests in anonymity.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

The dairy farm in upstate New York where nearly half a million people gathered for three days of peace and music in 1969.

A gazebo that inspired the fifth episode of the "Twilight Zone" still stands in the creator's hometown

This park contains a number of standing stones meant to heal and inspire.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

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

Yo, Adrian!