Experience a quartz crystal sound bath inside a storied, all-wood sound-chamber.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A local farm's collection of unusual structures from a now defunct storybook amusement park.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

Law-protected wreckage serves as a peculiar memorial for an almost forgotten World War II tragedy.

Remnants of a storybook amusement park hidden behind a strip mall.

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

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Abandoned rock quarry now a haven for mountain bikers and hikers.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

Floating man-made island and upscale restaurant.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Rummage through this sunken ship, but leave your scuba gear at home.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

Tens of thousands of tiny birds swarm into one school chimney every fall.

These machines have been collecting dust for decades.