A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

Commemorating the spot where the famous scientist fed his pigeons.

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

The taxidermy remains of the most popular pony in children's literature.

The 28,000-year-old specimen is remarkably intact.

A home decorated by its owner with eye-catching and captivating assemblages of found objects

A unique columnar residence built in the 19th century.

A safe space and resource for anything and everything relating to sex and sexuality.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

This 3,500 pound obelisk was constructed with more than 1,000 reclaimed guns.

This historic sculpture from the 16th century is even older than the city of Boston.

Statue commemorating the use of ether in anesthesia.

This sculpture dedicated to a pioneering labor unionist and civil rights activist is located inside a busy Boston train station.

This plaque is dedicated to a historic hotel’s Canine Ambassador and the subject of two children’s books.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

An enormous, inside-out glass globe built in 1935.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

One of the now-less-hidden floral gems of the "Emerald Necklace."

A 17th-century Japanese bell brought back by U.S. sailors after WWII and later gifted as a symbol of peace.

This impressive Boston holy house is the American mecca for Christian scientists.

Site of the first World Series

A simple Colonial home with a past haunted by death and madness.

This plaque honors the unsung Black songstress once known as the “greatest singer of her race.”