Natural time capsule containing an alien ecosystem.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

Someone left a Boeing 737 in a field in southern Bali.

The wing of this deserted Boeing 737 almost touches the Dunkin' Donuts next door.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

The hellish conditions of this abandoned mine that snakes beneath the Pacific Ocean gave it its diabolic name.

The remains of this visionary community can still be found much as it was a century ago.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

Unique tower has outlasted a takeover of the company.

The spot where the namesake of the Douglas fir met his mysterious end on a Hawaiian volcano.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

The smallest post office in the United States is no bigger than a broom closet.

The largest retailer of seashells in the world.

The only runway directly into the magic kingdom has been closed since 1972, but it still sings to you if you drive fast enough.

A tribute to the furry local heroes who helped get residents through many tough times.

Four metal statues of massive animal penises stand outside the university's Animal Sciences building.

This Florida resort community is where the Amish come to have fun in the sun.

In memory of the 110 victims of ValuJet Flight 592 that crashed in the Everglades.