A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

A staggering collection of photographs depicting medical, social, and historical change.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

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

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

A popular European tradition makes its way to the states on one of America's most famous bridges.

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.

The "Seinfeld" diner.

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

Elevated freight railway turned wildly successful urban park.

Try not to get slimed in Tribeca.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The tallest residential building in Africa is an unsettling Brutalist monolith.

The ruins of a medieval monastery named after a type of tree.

A Neolithic passage tomb said to have sheltered two legendary Irish lovers.

This single room has survived the centuries with almost no deterioration.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.