This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

This fancifully decorated Victorian home in New York’s Hudson Valley is the only known fully domed octagonal residence in the United States.

A Ukrainian church canteen doles out hearty fare in an East Village basement.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

Stunningly detailed mosaics in a New York subway station bring life to the Weimaraners of artist William Wegman's work—and to thousands of commutes.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

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

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

A hip bar decorated with walls of golden skulls.

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

Elevated freight railway turned wildly successful urban park.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A terrific purveyor of natural history objects and curios.