One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

A new kind of theme park for adults off the Las Vegas Strip.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

An essential stop before plundering, BYO Cutlass.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

This beautiful ridge-top trail is dotted by tiny homes apparently built by a group of itinerant fairies.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.