This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

Sculptures, jams, and the wild west collide at this folksy retreat.

A short nature trail winds through the greatest works of poet Robert Frost.

Pick up a kebab and a credenza at this unique combination furniture store and café.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

A tunnel with windows, so you don't miss out on the impressive views.

Astounding collection of coin-operated games and automata.

The birthplace of the Ford Model T is now a museum full of antique cars.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

Location of the Real World's disastrous, and protested, eleventh season.

Abandoned since the 1950s, the streetcar lane beneath the heavily trafficked bridge lays empty and unused.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

A Spiritualist house of worship where believers communicate with the dead in the spirit world.

In the basement of the U.S. Capitol Building is a hidden storage room full of ornate floor tiles leftover from the 1850s.

Easter in Westminster may be the only time and place to behold Edgar Allen Poe made entirely of Marshmallow Peeps.

A painfully obvious spy house sits right across the street from the Russian Embassy.

The site of the climactic scene from the classic horror film is now a historic landmark.

Recycling meets art in this colorful barricade.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

You can walk through the first Boeing Air Force One, which famously carried JFK's casket from Dallas back to D.C.