Golden Gate Park's historic collection of plants.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

One of the ghostly stops along Route 66.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The ghost town that ended up on Ebay.

Explore 10 acres of environmental sculptures.

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

Quite simply the largest tree in the world (by volume).

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

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

A look into the Church of Scientology's deeply unfavorable view of psychiatry.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Abandoned Air Force base that has fallen into disrepair.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

This giant temperature attraction created some giant electric bills.

The most isolated mailbox in America lets desert travelers record their passing.