A treasure hunter's tiny bar, harboring celebrities since 1959.

Feeding hungry Ballard boat workers since 1922.

A castle built by an eccentric medieval enthusiast in rural Ohio.

A place to eat for on-the-run agents and espionage enthusiasts.

Mining town from the late 1890s, once home to Calamity Jane.

The 606 is a decade in the making.

The world's largest military aircraft cemetery.

In the middle of downtown Brooklyn lies a 165 year old secret hidden right below the surface (closed to the public indefinitely).

Ruins of the Crusaders' headquarters.

A 140-year-old castle with underground caves hidden in San Francisco.

The last of its kind in the country.

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

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

A science teacher's dream.

An antiquated German apothecary on Chicago's North Side.

Taxidermy, Cigar Store Indians, A Model of a New York Tenement and Delicious Draft Root Beer.