This little blue house pokes out over the campus of UC San Diego, seven stories high.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

One man's quest for the ultimate road trip vehicle.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

The crumbling remains of a once-grand building.

A yoga studio and venue for "chill-out parties" in a former chicken slaughterhouse.

Check out the underground party scene at the "Burning Man of Brooklyn."

An 1883 schoolhouse now home to collective of artists.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

A recently abandoned psych ward at the end of Sanatorium Road.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

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

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A crumbling hospital from the 1850s on Roosevelt Island.

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

Walking by this fence is like strolling along a portal to various fictional worlds.

A short hike into the mountainside forest reveals a decaying 1890s town.