A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Volunteer-run library dedicated to exploring five decades of activism history.

“Invented in Key West, Perfected in Brooklyn."

New York's oldest and possibly grandest keeper of books.

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

People can't get enough of these adorable Japanese photobooths.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

The historic “pink house on the hill” is an architectural gem that now serves as a center for water conservation.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

A self-built castle made by a mysterious man.

Take a drunken tour inside the world's largest known geode.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

This semi-secret storybook hedge maze is also the oldest garden in the city.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Two thousand artifacts from around the world collected by one woman who loved to travel.

Bioluminescent firefly squid light up this Japanese fishing port.

If Hello Kitty were Mickey Mouse, this would be Disneyland.

Experience park where visitors are told to expect the unexpected.