360° views of the city plus five floors of optical illusions and hands-on science.

This half-finished "city of toys" was almost Italy's own Las Vegas.

See what remains of a once grand ancient Roman circus.

A small sculpture that pays homage to the famous bronze ear of Ca de l'Oreggia—or does it?

A larger-than-life house of cards stands outside the house of a former fashion designer.

The smallest island in Manhattan is a manmade landfill dominated by a Buddhist peace arch.

A popular European tradition makes its way to the states on one of America's most famous bridges.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

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

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

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

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

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A dilapidated dock tells the story of Titanic's missed arrival.

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

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

One of only two commuter aerial tramways in the United States.

Site of the first pathological and bacteriological research facility in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

A guitar mounted on a wall in Temple Bar honors the Irish musician.