The U.S. Air Force has an anti-satellite laser weapon.

This pseudo-steampunk weapons facility is the world's largest wood and glue structure, and packs quite a wallop.

Ethereal alien hums and haunting whale songs emitting from...a giant sheet of vibrating metal?

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The century-old remains of an abandoned farm town in eastern Washington.

This large Sitka spruce that appears to be floating in mid-air, has defied logic for years.

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

The location of the last stand of Charles Manson's doomsday cult.

A showcase of engineering might that was also symbolic of westward expansion.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

North Central Florida's largest flea market and a weekend roadtripper's dream.

One of Mother Nature’s geological gems, home to many prehistoric fossils.

A clear blue swimming hole with hidden caves, still unexplored.

Setting this massive marionette aflame rids Santa Fe of doom and gloom for another year.

The largest known open fault in the United States is basically a giant natural refrigerator.

A ruined mansion hidden in the woods of the Hudson Valley, home of a tragically doomed romance.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

What was once a trend-setting, phrase-coining icon of architectural splendor is now a rotting, forgotten hulk.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Some of the earliest burial grounds of New York State are to be found hidden away in this quaint town.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

A WWI fighter plane and turn-of-the-century penny candy shop are among the unexpected features of this Financial District building.

A dark, narrow tunnel that leads to a charming lake and waterfall.