A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

A beautiful Victorian-era cemetery, complete with a miniature village.

What may be Boston's finest Art Deco building, located in the city's Financial District.

The bears may be gone, but their old cages can still be found.

A museum dedicated to antique toys, collectibles, and nostalgia.

Final resting places of a husband and wife who became famous for their claims of extraterrestrial abduction.

Maine’s only official memorial to the Underground Railroad.

A beautiful, water-filled quarry that has become a popular haunt for swimmers and artists.

This candy-striped tower is the farthest east you can go in the United States.

Steam engines and conveyor belts are remnants of a genius system left in the middle of the Maine woods.

Trinkets and toys lovingly handmade by maximum security prisoners.

Former laboratory of radical psychiatrist Wilhelm Reich.

This uninhabited island in Maine is home to various works of art left by visitors over the years.

This 19th century granite fortification is one of the most well preserved forts in New England.

This Maine bridge may be the last wire-supported bridge of its type in the world.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

This tiny patch of arid sand sits in one of the greenest states in the United States.

Nature and religion are reunited at this unconventional church in the forest.

Maybe the only missile installed in a public park, this Cold War leftover was one of the first to carry a nuclear warhead.

An overgrown and abandoned tuberculosis ward resides in the midst of a quaint modern neighborhood.

A small museum packed with specimens from important fossil sites and minerals from historical pegmatite quarries.