A sudden forest of traditional Papua New Guinean art works is hidden in a corner of Stanford University.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

Gold Rush-era tombstones line the park's paths.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

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

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

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

San Francisco's newly reopened hands-on science museum.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

Sitting atop San Francisco's tallest hill, a cross honors the victims of the Armenian genocide.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A hidden world of exotic succulents and cacti.

The largest permanent Monopoly board makes one of the longest games even bigger.