A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

An alchemist's "magic door" stands in the middle of a Roman park.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

This geothermal hot spring hides beneath a slowly growing mineral dome.

An acoustic anomaly with a mysterious cause.

World-famous, Pink's still manages to keep its prized cult fetish status.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

A hands-off space for graffiti artists to hone and display their skills.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

More gold than anywhere else, ever.

The magical, mossy forest that inspired Princess Mononoke.

A modernist landscape of water and sci-fi concrete.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The private clubhouse for the members of the Academy of Magical Arts.

One person's lost luggage is another person's treasure.

A lush green oasis in the middle of Chicago.

The largest self-built castle in the U.S., six decades in the making.