An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

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

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

"Enter and be entertained or annoyed by Dada in Walla Walla."

One man's eclectic collection of treasures found at sea.

A series of sculptures beneath the waves promote ocean conservation and support coral reefs.

Stay in your own little bubble.

Reportedly 1,400 years old, this may be the first of the Fiji Mermaids.

Stay in a room with a view... of the bottom of the ocean.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

For divers and music lovers, the Florida Keys' Underwater Music Festival provides the best of both worlds.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

A once grand hotel now sits eerily abandoned in the Catalan countryside outside Barcelona.

A dilapidated amusement park with a million-dollar view.

Once the largest attraction in Rhode Island, this former amusement park is now a gorgeous coastal state park.

This attraction was abandoned after the Chernobyl disaster.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

The decaying remains of a 1960s mechanical wonderland that never officially closed.