An emerald-green grotto just a short trip from Austin.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A crumbling hospital from the 1850s on Roosevelt Island.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

World's largest collection of serial killer artwork and other macabre exhibits.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A psychedelic labyrinth on the San Francisco bay.

Victorian-era Egyptomania left its mark on this Nashville landmark.

The R&B singer's modest church guarantees a religious experience, regardless of your beliefs.

These early tent-shaped grave coverings are unique to Appalachia.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

An engraved boulder marks the spot where Patsy Cline's life ended in a plane crash.

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

An oversized metal construction of Billy Tripp's moods going through life.

When Motown musicians came to Nashville in the 1960s they stayed at this historic record-pressing company because hotels wouldn't host them.

Elvis's own personal tropical hideaway.

A reclusive Memphis neighborhood is home to decades worth of misunderstood Masonic folk art.

This award-winning men's bathroom was just too beautiful to not allow women to see.

A delightful park featuring homemade scale replicas of dinosaurs, tucked away in the Tennessee mountains.