Elevated freight railway turned wildly successful urban park.

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

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

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

New York's oldest magic store.

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

Remants of foundations, streets, and streetcar tracks inhabit the cliffs where a landslide occurred in 1929.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

Two adjoining collections of 19th-20th century physics apparatuses and instruments.

The biggest museum dedicated to insects in North America, one of the largest in the world.

A vast collection of rare books, manuscripts & extraordinary objects illustrating the history of medicine.

A parade of antique steeds offers a quirky ride through history.

This stunning Connecticut mansion is actually just a one-room-deep hoax.

The world's largest indoor go-kart racetrack is hiding in Connecticut.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

A seasonal movie monster museum featuring wax creations by a relative of one of the original Universal Studios monsters.

A former copper mine which became a truly unsuccessful prison.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.

137 graves holding New England's earliest residents.