Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

A monument to the love people have for their pets.

Guns that have been defending San Francisco since 1904.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

The headquarters of the famous Yale society.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

A beautiful, dense forest in the shadow of Mount Fuji, with a tragic reputation.

Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.