One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

The oldest still-operating tavern in the United States was once owned by a pirate.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

The oldest surviving botanic garden in the United States.

The first American department store, and home to the largest operating musical instrument in the world.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Where America's first doomsday cult awaited the end of the world.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A terrific purveyor of natural history objects and curios.

A collection of intricate sculptures so small they have to be seen through a microscope.

A pub that is literally in the middle of nowhere, but continues to do business.

This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

The ruins of an ancient island city built atop a coral reef in the South Pacific are spectacular and strange enough to have inspired H.P. Lovecraft.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A semi-scholarly approach to sex.

Hidden in an ordinary Midtown building is a one-room museum dedicated to the greatest escape artist.

This semi-hidden Manhattan restaurant is based out of a loading dock.