Hundreds of hidden passageways weave through the old quarters of Lyon.

Monsters and miniatures are held in equal esteem at this wondrous museum.

There must be a pun in this haystack somewhere...

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

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

Slyly buy a shake in the Parker Meridien lobby.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

A mechanized clock where a man fights off a dragon, crab, and rooster.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

Detailed facade of a brownstone in Boerum Hill.

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

New York City's smallest piece of private property.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

An unassuming secret door once led to a legendary watering hole.

This semi-hidden Manhattan restaurant is based out of a loading dock.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

New York's oldest magic store.

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

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

Commemorating the spot where the famous scientist fed his pigeons.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.