An underground magnet for ever-changing street art.

The beauty of urban decay, hiding some dark secrets.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Just a few miles from downtown Atlanta is a trail covered in a crazy collection of outsider art.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

The "Seinfeld" diner.

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

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A celebration of capitalism in Midtown.

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

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

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.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

A semi-scholarly approach to sex.

Try not to get slimed in Tribeca.

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

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

A crumbling hospital from the 1850s on Roosevelt Island.

The words of the neighborhood's most famous poets adorn four concrete walls.

The mall's looks were inspired by the cowboy extras who used to meet up—and cause real trouble—at this Hollywood hub.