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

Rainbow-hued local gem in Venice.

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

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

A 140-year-old castle with underground caves hidden in San Francisco.

A winding path built in secret on the edge of the continent.

Ancient temple is home to centuries of art and spiritual artifacts.

Along a rail-biking route, giant insects house a two-story restaurant.

The darkest building on Earth was built for the snow-white scenery of the 2018 Winter Olympics.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A hands-on traveling collection of the innovative devices of yesteryear.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

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

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

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