Don't get it twisted: This is the oldest pretzel bakery in the United States.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Beach instrument turned bed and breakfast.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

A Manhattan office building is home to the world's largest chess board.

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

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

The only subway station in the city that still makes use of gap fillers.

An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

This sprawling art park is filled with sculptures, nature trails, and art workshops.

Thousands of bottles that have held everything from poison to perfume make up the collection of this small museum.

This eclectic sculpture garden in Brooklyn, home to a bizarre collection of art, was once a run-down junkyard.

The painter who popularized "bulls" and "bears" as symbols for the stock market didn't get a proper headstone for over a century.

In Little Caribbean, an ice-cream shop serves up regional flavors, including soursop, Irish moss, and "greatnut."

This controversial statue has migrated twice in its life.

One of the remaining markers of an era when Brooklyn and Flatbush were separate cities.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This secluded ruin was once a home for exotic plants.

On the hills of Bay Ridge stands a house straight out of a fairy tale.

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

The inventor of the Coney Island hot dog rests in a grand mausoleum in Brooklyn.