The former hotel where Tesla invented the radio.

This hidden library of physiological ephemera contains centuries worth of knowledge on the vim and viscera of the human body.

Detailed facade of a brownstone in Boerum Hill.

Nondescript elevator doors open to reveal a stunning, surreal world.

Unique antiquarian shop specializing in globes, maps, and prints.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

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

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

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

A hip bar decorated with walls of golden skulls.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A crumbling hospital from the 1850s on Roosevelt Island.

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

Frida Kahlo's childhood home, now a museum of her life and works.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Where sweethearts leave their love locks in the Uruguayan capital.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

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

Derelict airplane bodies serve as both home and income for three Thai families.

Op-art architecture designed for happiness.