The largest puppetry museum in the United States houses the world's most complete collection of Jim Henson artifacts.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

Surrounded by traditional homes, this Tolkien-esque dwelling stands out on a quiet street in suburban Maryland.

The first ever diner included on the National Register of Historic Places is famous for its custard French toast.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.