This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

A fitting attraction for the corn capital of the world.

Commemorating the spot where the famous scientist fed his pigeons.

A very classy 1920s-era bar right in Grand Central Station.

A crumbling hospital from the 1850s on Roosevelt Island.

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

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

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

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

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

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

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

Peek through the gates at this oasis from the city, full of Old English charm.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."