This amazingly preserved Gold Rush town is a historian's dream.

This tiny movie theater was the last one in the U.S. constructed in the Nuevo Deco architectural style.

A smoke stack so large, the Washington Monument could fit inside!

Even Henry David Thoreau found this glacial pothole irresistible.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

A recently abandoned psych ward at the end of Sanatorium Road.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

The two-cell building in Nebraska was briefly owned by a teenage boy and then a Hollywood dummy.

A brick-paved former section of the historic coast-to-coast highway.

An experimental, automotive replica of Stonehenge.

This erect, phallic geological spire wasn't always named so domestically.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

A palatial art deco restroom.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

This massive roadside mascot was the first version of the giant to illustrate his butt.

Ever wanted to can Spam?

This large midwestern cavern features impressive rock formations and an underground waterfall.

A crumbling mountain resort that looks like it was abandoned in an instant.

Two dozen rescued bears roam (mostly) free at the largest bear ranch in the U.S.