One of the oldest medical collections in Europe focusing on rare surgical instruments.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A suburban museum tells the story of a historic transportation network and even provides rides in antique trolley cars.

A historic cemetery filled with quirky faux wood art and unique tombstones.

This massive swimming pool is the high tech home to the human-powered submarine races.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

This former asylum for Black Americans is haunted by its history of violence and racism.

After hundreds of years of settlement, this once-bustling fishing village sunk into the Chesapeake Bay.

The shelves in the back of this thrift store are devoted to saving, not selling, retro tech.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

An eerie, decaying ghost town destined to fade into the forest.

A priceless collection of the Nation's cryptologic history.

An astounding collection of medical specimens, including bits of President Lincoln.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

Two gems of Beaux Arts architecture that have been sitting vacant for years.