Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

Historic Greenpoint theater turned roller disco, then chain pharmacy, and now Sweetgreen.

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

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

An artist's cute bronze subway sculptures belie his violent artistic past.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A graffiti Mecca welcoming artists from around the world.

Detailed facade of a brownstone in Boerum Hill.

100 massive sculptures in the Hudson River Valley.

The largest catacomb system in the world.

Nature and beauty amidst pollution and industrial wreckage.

An illegally built ramshackle mansion tucked in the middle of Brooklyn is now being turned into condominiums.

Phil Mortillaro uses keys to bring art back to the Village.

Unrepaired walls from a 1920 anarchist bomb attack.

Four cars from the old system were once on display, but were removed in 2014.

Remains of a station that only operated for one year.

A crumbling hospital from the 1850s on Roosevelt Island.

World War II bunker still standing on the New Jersey beach.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A hidden "place of interment for gentlemen."

Little Red Lighthouse under the George Washington Bridge.