Ruins of a historic medical facility sits eerily by the water.

This cramped crevasse saw the entire population of its island suffocated inside its depths.

One of the oldest continuously operating amusement parks in the U.S. is an open-air museum of Art Deco and neon lights.

The site of a fallen tree that protected Americans from British forces during the American Revolution.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

A tribute shrine where the Space Invasion street art movement started.

Where America's first doomsday cult awaited the end of the world.

An abandoned amusement park based on the popular 1940s Red Ryder comic strip.

The fictional star of "Breaking Bad" is memorialized with a real-life gravestone in his hometown.

The symbol was surreptitiously built into the river bank by German prisoners of war.

Inside this small museum resides a strange mix of miniature collections passed down over time.

A blacklight journey through a celestial art exhibit.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A museum dedicated to the alleged Roswell Incident.

The district's only illusionarium supports free writing programs for local students with every purchase.

A "Titanic" superfan changed his name to Jack and set up this strange shrine to the blockbuster, complete with Korean food and Tarot readings.

Sister store to the Echo Park Time Travel Store.

World-famous, Pink's still manages to keep its prized cult fetish status.

This surreptitious shop is only open five hours per week.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

This print shop boasts one of the largest pinball arcades in San Francisco.

This secluded ruin was once a home for exotic plants.