This giant disembodied horse head seems to balance impossibly on its nose.

A quirky collection of outsider art made from automobile parts.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

An ideal wedding spot that is almost too ideal.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

The abandoned coal loading dock is a canvas for unsanctioned art.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

This huge, disused viaduct is now a crumbling concrete underworld of covered in years of graffiti.

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

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

A local prank turned town icon.

It would take 35 firetrucks to fill this enormous glacial pothole.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

An outlandish shoe shaped house built by an eccentric millionaire.

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

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

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

The oldest surviving botanic garden in the United States.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.