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

A psychedelic labyrinth on the San Francisco bay.

The only theatre in the world constructed specifically for sound movement.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

Dramatic river bend surrounds a natural red-rocked pedestal.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A church of bones, decorated with 40,000 human skeletons.

Medicinal spa created with the discharge from a geothermal energy plant.

On the Oregon coast there is a natural hole that seems to be draining the sea.

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

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

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

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A huge musical instrument played by the ocean.

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

The vast, legendary catacombs hold secrets much stranger than stacked bones.