Nikola Tesla's former home contains an homage hidden from plain sight.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

The site of the deadly Triangle Shirtwaist Factory Fire.

Plot your trip through the city on the sidewalk.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

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

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

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

Twice a day one of these tragic bronze mariners drowns with the tide to remember all those the sea has taken.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A popular European tradition makes its way to the states on one of America's most famous bridges.

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

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

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

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

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Historical figures from New York City's Catholic community reside in Midtown.

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

Elevated freight railway turned wildly successful urban park.