A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

A castle that was built stone by stone by an eccentric journalist.

This frequently-photographed waterfall takes only a short hike to visit.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

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

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

Mysterious rocks that ring musically when struck.

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

The world's only international cryptozoology museum is host to an unrivaled collection of mysterious objects.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A strange house built only at night, with rumored mystic inspiration.

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

A library of rare occult books in Los Angeles.

Olfactory delights in San Francisco's Botanical Gardens.

Rainbow-hued local gem in Venice.

A museum befitting the city responsible for supplying the majority of the world's LSD.

A beautiful geyser under environmental threat.

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