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

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

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

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

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

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

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

A terrific purveyor of natural history objects and curios.

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.

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

The home of the world's first and last remaining "wooly ant."

A statue of the owner stands outside of this museum, once the most popular brothel in town.

A brief journey through early 19th-century pioneer life across Linn County.

Journey through a bit of nostalgia inside this classic record and video store.

This hotel has hardly changed in over a century, like a time capsule of old Oregon.

This Portland shop is brimming with natural wonders, local art, and handmade goods fashioned from recycled materials.

This Portland Art gallery doubles as a studio that supports adults with intellectual and developmental disabilities.

This small, rural pioneer cemetery is full of interesting grave markers.

A sprawling cave network created by a lone lava tube.

Instead of fruit, the branches of this tree are brimming with hopes and dreams.

Entering this curiosity shop is like stepping into a mad scientist's lab.