World's first "penitentiary," meant to be humane, drove men insane.

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

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

Rippling sand dunes frozen in the Arizona rock.

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

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

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

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

A psychedelic labyrinth on the San Francisco bay.

A terrific purveyor of natural history objects and curios.

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

A huge musical instrument played by the ocean.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A somber monument commemorates the site of a Native American reservation marked by suffering.

This comprehensive collection features Native American artifacts dating back centuries.

The longest non-mortared wall in the country is one man's tribute to his displaced Yuchi ancestor's five-year journey to her homeland.

The first permanent memorial to a unique secret weapon of World War II.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

A monument to the Mohawk people stands along an old Native American trade route.

This museum pays tribute to the Cherokee leader who created a written language for his people.

This overlooked gem outside Niagara Falls preserves and celebrates Iroquois culture.

The only Native American comic shop in the world.

A trail weaves through the verses of a poem illustrated by stone sculptures inspired by Native American pictographs.