Extraordinary sculpture garden created by an eccentric English poet.

A face emerges from the landscape when seen from the air.

These azure waters were thought to lead to the Mayan Underworld.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A series of five defunct panopticon prisons in Cuba.

The rocks of a certain area of Butte, Montana give off a musical ring when hit.

One of the deepest blue holes in the world.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Step into the cool deep past and unknown future of who begat who.

An architect's childhood fantasy treehouse made real.

A lake at the bottom of the ocean.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

Eclectic collections, artwork, and some feline friends fill the writer's former home.

Friction between grains of sand cause a curious "singing" sound.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

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

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

A formerly abandoned mental institute, now back in business.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

Mansion and shopping center used in the 1975 film "The Stepford Wives."

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

The loneliest island in New York.

"A hideous albatross in the Hudson River Valley."