Playable, historic pinball machines fill this Alameda museum.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

A library and museum dedicated to typography.

A promotional sun clock on the site of San Francisco's great raceway.

An optical illusion found amid a logged redwood forest.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

One of the last free public hot springs is decorated with hippie art.

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.

The ghost town that ended up on Ebay.

This glamorous old building is said to have inspired the Tower of Terror.

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

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

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.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

Ingenious bakery opens up the first Cupcake ATM at their flagship location in Beverly Hills.

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

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