Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

An inconspicuous footbridge beloved by San Diego locals.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

In this century-old literary safehouse, print is alive and well.

The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

The programmatic glory of LA's giant whiskey barrel building has become an upscale reminder of the city's kitschy roadside past.

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

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

A meditative space out of a fantasy story.

This Big Sur waterfall drops 80 feet directly into the Pacific Ocean, and inspired the hillside house up top.

A whimsical village of unique treehouses resides in a Washington forest.

Explore 10 acres of environmental sculptures.

Canyon walls shrouded in ferns.

An essential stop before plundering, BYO Cutlass.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A reproduction of earth's many biomes.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

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).

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This naturally-sourced hot spring is now home to a clothing-optional resort.