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

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

This abandoned subway station can still be seen on regular commuter trips.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

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

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

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A celebration of capitalism in Midtown.

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

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A very classy 1920s-era bar right in Grand Central Station.

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

An ancient underground cultic temple where sunlight penetrates on the summer solstice.

These mosaics were created more than half a millennium ago and feature various animals.

A walk along this white sand beach creates a symphony.

A mysterious suspended hand greets unsuspecting visitors at the Tower of London.

This striking church was built from a Frank Lloyd Wright design more than a decade after the master architect's death.

Created by a local artist, these quirky sculptures each have their own names and personalities.

An astonishingly accurate water clock that doubles as an hourly spectacle in this Berlin shopping area.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

Taxidermied cartoon heads, unseen illustrations, and famous characters all reside in this small gallery space.

This unique shop is full of memento mori art, antique medical equipment, secret society paraphernalia, and historical relics.

After the oysters have been shucked, and the restaurant's been shuttered, the terrazzo sidewalk from the 1940s is all that remains.