The legendary building that needed ghostly approval before being built.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Unrepaired walls from a 1920 anarchist bomb attack.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

A bizarre house filled with an astounding array of collections.

Marta Becket's hand-painted theater in the desert.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Largest gathering of hobos in the country has been meeting annually since 1900.

This tiny little island has, as the name says, just enough room for its single house.

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

Annual celebration commemorating the 1965 sighting of strange lights in the town.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

A UFO scrapyard in the California desert.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

A self-built castle made by a mysterious man.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.