The eccentric mansion of one the most popular horror authors of modern times.

The largest tidal whirlpool in the Western Hemisphere.

Built for television, this statue now serves as an unlikely memorial to a fireman who died on 9/11.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

Less a museum than a bizarre fantasy world created by artists and engineers.

A reproduction of earth's many biomes.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

A rare wayfinding portmanteau of “Street” and “Avenue.”

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

The ancient tomb acts as a calendar that keeps perfect time.

A hugely vast Irish landscape of barren rock that stretches for miles.

Home to the deepest rift anywhere on Earth.

The world's longest known cave system.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A geological mystery on Camelback Mountain.

Catch a glimpse of the elusive Peninsular bighorns right off of the desert freeway.

A herd of 150 bison live on California's Santa Catalina Island and are at the heart of an ongoing debate between environmental protection and economic expansion.

The hidden jewel of Disneyland: a members only playground for the Disney elite.

San Diego's most historic and haunted home.

An extraordinarily ornate museum in San Diego holds wondrous anthropological treasures.