This cheese shop also houses a museum devoted to Dutch dairy.

A poignant museum dedicated to the history of the Dutch resistance against Nazi occupation

A floating cat sanctuary on an Amsterdam canal.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

Europe's first floating restaurant is home to a hilarious legend.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

100 massive sculptures in the Hudson River Valley.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Visit the monolithic tomb of America's most famous general.

The "Seinfeld" diner.

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

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

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

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

Commemorating the spot where the famous scientist fed his pigeons.

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

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

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

The only subway station in the city that still makes use of gap fillers.

The most confusing clock in New York.