The largest retailer of seashells in the world.

This home is decked out like a psychedelic explosion of colors and bowling balls.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This is the house that spite built.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

Resonating tubes make music from highway overpass.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Trash escaped from a landfill to fill beaches with all kinds of treasure.

Books you don’t need in a place you can’t find.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

A luxuriant botanical garden below sea level.

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

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

A famed data visualizer's personal sculpture garden is a landscape of modern and megalithic wonders.

This historic railway museum may have lost its passengers but not its love for trains.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

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