A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A simple midtown bar was once the home of a secretive and exclusive club staffed by "bunnies" under Hefner's strict rules.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Hundreds of antique bank vault locks on display in New York City.

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

A bit of retro transportation flair preserved in the world's largest department store.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

Lie in a hammock where George Washington stood.

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

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

Slyly buy a shake in the Parker Meridien lobby.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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

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

Elevated freight railway turned wildly successful urban park.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

The celebrated eyesore created by starry-eyed sweethearts.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

This bridge was constructed from the rubble of the infamous Bastille.

The recovered bones of martyrs slaughtered during The Terror are on display in this church crypt.