When the rain falls, this drain system turns into a musical instrument.

One of the oldest living oak trees in the Southeast.

A spiritual retreat in the heart of Los Angeles offers stunning gardens and a labyrinth to lose yourself in.

The oldest surviving synagogue in New York City is now a soaring art space.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Museum dedicated to awful artwork.

One of the oldest reform schools in the United States, home to wayward boys such as Merle Haggard, now abandoned.

Abandoned medieval hill town.

This elegant arc of a waterfall marks a religious turning point.

Where manatees are the snowbird vacationers in these balmy Florida springs.

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

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

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

The final resting place for the remains of 143 Habsburg royalty.

Remnants of a Victorian garden feature sitting in public woodland.

This cemetery features modernist statues as strange as its name.

A Saint Nicholas-themed ghost town in the Mojave desert.

A 300-yard long natural tunnel runs through a ridge deep in the Appalachian Mountains.

Nine Gardens in one—with tea service.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

One of the most remarkable caves in all of Iceland was created by a once raging river of lava.