The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

Twenty-three trees, each paired with a basalt stone, line a street in Chelsea, continuing an urban project started by German Fluxus artist Joseph Beuys.

Elevated freight railway turned wildly successful urban park.

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

The most confusing clock in New York.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Magnificent New Deal Murals evoke a time when New York City harbor was one of the world's greatest and busiest ports.

The home of the first American-born saint is one of the only curved buildings in New York.

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.

The last remnants of what was once one of the world's grandest hotels can now be found in a Manhattan subway station.