This striking arch, one of the first architectural elements constructed in Prospect Park, was recently restored to its original glory.

This secluded ruin was once a home for exotic plants.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

A tree that grows parallel to the ground was declared Brooklyn's "crowning curio" by the poet who saved it.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

A well-worn marker in a forgotten alleyway is all that remains of what had been one of Manhattan's most beautiful buildings.

These century-old townhouses contain some of the first car garages built in the United States.

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

An institution dedicated to the towering buildings that make up skylines in New York City and around the world.

This unique house, the only one of its kind in Brooklyn, was built as part of a real estate developer's showcase.

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

New York's oldest concrete structure is being preserved thanks to the gentrification of Whole Foods.

The world's largest collection of materials relating to lesbian history is housed in a Brooklyn townhouse.

A mosaic made of materials gathered from this Brooklyn community adorns the walls of this tunnel.

The highest rapid transit station in the world.

This unusual subway stop was originally a real estate office.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.

A retired oil tanker now offering amazing views of New York City.