A massive ultra-modern church presents a science-fiction view of Catholicism's inclusive future.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

Small monoliths of several varieties of stone sit alongside a wooded path in the Bronx.

Surrounded by low rise buildings and partially converted into an auto body shop, this marble archway is the only vestige of a forgotten Manhattan estate.

Little Red Lighthouse under the George Washington Bridge.

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

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

This was one of the first (and last) university-built and operated nuclear reactors.

A Natural History and Science Emporium.

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

Slyly buy a shake in the Parker Meridien lobby.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Commemorating the spot where the famous scientist fed his pigeons.

Need to book a room at the Hotel Pennsylvania? Just dial up 6-5000.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

Rummage through this sunken ship, but leave your scuba gear at home.

Red frames showcase remnants of one of New York's original subway stations.

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

New York City's smallest piece of private property.

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

Plot your trip through the city on the sidewalk.

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

San Francisco's newly reopened hands-on science museum.

Famously misunderstood wonder of the ancient world