Mysterious 500-year-old tapestries depict a unicorn hunt.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

A hip bar decorated with walls of golden skulls.

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

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A century-old network of freight tunnels underneath the city's historic business district.

The subtle science of a master molecular gastronomist.

Chicago's museum dedicated to the history of bondage and fetishism is more textbook than titillation.

Years of archaeology, just chillin' by the water cooler.

A hollow cement depiction of time's inexorable effect on the human body.

A lush green oasis in the middle of Chicago.

The 606 is a decade in the making.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

An "anarchical" no man's land, complete with garbage sculptures and a hobo-run "Landfillian Library."

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

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

Reverend Jen's unique museum/living room showcases her troll collection.

Prove you deserve to be fed by Kenny Shopsin.

Discover the taste of mold.

Become a prohibition rebel.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

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

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.