This 16th-century monastery was founded to cloister the daughters of wealthy local families.

This free sculpture garden is home to over 90 artworks and installations from artists around the world.

A 200-year-old bar is all that remains of one Mississippi River town's rough-and-tumble past.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

World War II bunker still standing on the New Jersey beach.

Designed to commemorate the founding of the first settlement in Delaware.

World War II-era bunkers are hidden under the beaches of this picturesque park, which is still scattered with wartime watchtowers.

The land is home to swimming ponies and a legendary 18th-century treasure.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

This unacceptably tall building was the real reason for Washington, D.C.'s skyscraper ban.

Garments from across the globe call this hidden gem home.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

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

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

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

The strikingly modern structure stands out among the brick buildings speckling the Harvard Business School's campus.

A real plaque marks the spot where a Faulknerian character committed fictional suicide.

A luxury hotel constructed out of a former jail.