A layered tribute to the work of mosaicist Isaiah Zagar.

A theme park that suffered massive flooding during Katrina was abandoned, and now proves irresistible to trespassing explorers.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The world's only museum devoted to the wonders of fluorescence.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A snapshot of the city's fascinating voodoo culture.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

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

A psychedelic labyrinth on the San Francisco bay.

An artsy hidden staircase leads to breathtaking views of San Francisco.

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

A terrific purveyor of natural history objects and curios.

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

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

This calm grassy field was once a Superfund site full of thousands of nasty chemicals.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.