The "Seinfeld" diner.

Read a book next to a Midtown waterfall.

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

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Try not to get slimed in Tribeca.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A crumbling hospital from the 1850s on Roosevelt Island.

A terrific purveyor of natural history objects and curios.

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

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

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

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

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

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

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

Love, knishes, and best wishes from this legendary Lower East Side bakery.

A hidden "place of interment for gentlemen."

A living archive of urban activism and space reclaimed.

A notorious punk house turned co-op.

Behind a grungy bodega facade, a Poblano family serves rich, home-cooked meals.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

This magnificent herd of stampeding elephants has been frozen in time for over a century.

This former crime corner has been turned into an eclectic community center.