With nickel-steel armor and three-inch thick bullet resistant windows, FDR's train was a rolling fortress.

The Uros people live on floating reed islands in lake Titicaca.

A market for witches is hidden within a train station.

A 140-year-old castle with underground caves hidden in San Francisco.

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

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

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

A surreal, Gaudi-inspired play space near an Anaheim community center.

A monument to the legacy of the man who created Spongebob Squarepants at the school where his passion for art and marine biology began.

Working mining and drilling equipment demonstrate 150 years of energy history.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

A Los Angeles cemetery that was once at the center of a Supreme Court dispute.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

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

This sculpture perfectly models the molecular structure of a drug that was never produced.

Once a dining hall for boarding school students, this lodge was a popular haunt for nuclear physicists working on the Manhattan Project.

This bird-shaped rock formation defies gravity, time, and classification.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

A sculpture of a flying hawk made from colorful car doors.

Setting this massive marionette aflame rids Santa Fe of doom and gloom for another year.