You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

These murals stand as reminders to the troubled history of this Northern Ireland city.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

The world’s first museum dedicated to exploring human rights unleashed a wave of controversy.

Erotic art covers the walls of the largest ancient pleasure palace.

This slender three-story building has also had several famous residents.

A modern zoetrope on the New York City subway.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

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.

The first piece of public art dedicated to LGBT rights.

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

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

The mummified relics of an American missionary.

Try not to get slimed in Tribeca.

The painter who popularized "bulls" and "bears" as symbols for the stock market didn't get a proper headstone for over a century.

Detailed facade of a brownstone in Boerum Hill.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

An extensive collection of fine art devoted to man's best friend.

Jail from the 19th century that was built by inmates.

This pop-culture shop also offers the chance to become part of their favorite tv show or movie.

The largest outdoor art gallery in the Northwest United States.