This little-known relic crypt holds stolen parts of a Roman Empress.

137 graves holding New England's earliest residents.

This whimsically unique butterfly farm focuses solely on creating habitats for the gentle insects.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

Established in the '60s, a family-owned tropical drink bar founded by Ray Buhen, bartender to the stars.

A carousel trades in its classic horses and calliope for endangered species, native flora and fauna, and a modern soundtrack.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The famous animator's private station house and man-cave was the birthplace of imagineering.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

A free library to stumble across, one of many placed worldwide if you know where to look.

The last of its kind in the country.

World's oldest operating science fiction and fantasy club, once home to Ray Bradbury and L. Ron Hubbard.

This hands-on math museum believes in turning concepts into constructs.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

One man's homage to the sun continues to grow like a glass fractal.

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Try not to get slimed in Tribeca.

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

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.