A replica of a 7th-century church hides in plain sight in the middle of the concrete jungle.

One of the first major shipyards in Brooklyn.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

What happens here stays here – unless it affects the whole world.

Once a flowing stream and where the USS Monitor, the world's first ironclad, was built and launched.

Come for the waffles, stay for more waffles.

Where the Monitor was launched and ushered in the age of the "ironclads."

Storage warehouse of the rich and famous.

Ornate "Renaissance Revival" style building.

The only remaining Jewish congregation in Greenpoint.

HBO series' stage tucked away in a Greenpoint lot is the largest theatrical set of its kind in the United States.

Built as a home for the Union Porcelain magnate in 1867, now the Greenpoint Reformed Church and home to a ceramic mystery.

Neoclassical bank designed by NY architects Helmle & Huberty.

Enormous one time fiber mill now houses local artists and small businesses.

This Upper East Side apartment co-op was designed as a tuberculosis sanitarium.

A group dedicated to promoting boating, kayaking and environmental education programs.

2 square block factory in Greenpoint erected in 1936.

Once called Winthrop Park in 1889, home to a decidedly sexy tribute to the Monitor vs. Merrimac battle.

On this island, you suck away your garbage via an elaborate pneumatic tube system.

Guerilla gardeners reclaimed this abandoned railroad land literally putting down roots.

The best B-movies filmed on a shoestring budget were born here.

This mysterious marker puzzles pedestrians and infuriates geographers.

Self-sufficient greenhouse floating on the Hudson River.

A licentious look into Singapore's past, full of disorderly bric-a-brac and disreputable characters.