A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Enjoy an overnight at an old haunted B&B site of the Borden family murders.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

The oldest surviving synagogue in New York City is now a soaring art space.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The intriguing personal collection of a professional demon-chaser.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

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

When ecosystems collide in the arid Southwest.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

St Bernard de Clairvaux Episcopal Church, better known as one of the oldest European buildings in the Western Hemisphere.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This free, take-a-book shop seems like a trick but isn't.

An abandoned stretch of highway, deteriorating next to the operational one.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Ruins of a German Castle on top of a towering stone pillar.

The highest bridge in America was built for an almost unnervingly small amount of money.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

Northern Ireland's Brobdingnagian stepping stones.

An abandoned castle owned and ignored by Masons carries a cursed history.