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

Get lost in this haunting fairytale art walk through a man-made eucalyptus grove.

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

A psychedelic labyrinth on the San Francisco bay.

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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The largest self-built castle in the U.S., six decades in the making.

Vintage furniture and art share space with all manner of collectibles at this quirky shop in Bangkok.

On stormy days debris from this unfinished and abandoned skyscraper rains down on the Bangkok streets.

Grandpa Rainbow felt the neighborhood needed some color, so he picked up a paintbrush and went to work.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

This hulking behemoth is actually five interconnected towers built in the 1960s.

America's only nuclear missile silo open to the public.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

World's largest precision optical instrument used to detect Einstein's elusive gravity waves.

This historic general store still operates much as it did in the late 1800s.

Built by prisoners of war, the largest small-scale model ever built includes eight miles of tiny streams that now sit abandoned.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

This award-winning men's bathroom was just too beautiful to not allow women to see.

An abandoned relic of the city's failed experiment with below ground transit.