A men’s restroom became a sandwich shop.

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

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

Statue commemorating the use of ether in anesthesia.

A three-piece musical sculpture installed between the subway tracks at Kendall Station near MIT.

An anonymous art project beneath Longfellow Bridge where hundreds of trophies line the steel support beams.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

The last remaining 19th-century tenement from Boston's old West End neighborhood.

A tiny plaque marks the location of the water source that facilitated the birth of modern-day Boston.

Painstakingly built dioramas sit unnoticed in a Boston office building.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

A 26-foot shark sculpture—a statement about bombs—set off a municipal battle royale.

You can still see bits of the camouflage used to hide this Art Deco building from bombers during World War II.

Tourists who rely on a transit map to find the iconic Beatles location often end up in a far-off neighborhood.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A wonderfully preserved example of London's 1960s-style high-density, low-rise public housing.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

A historic hill of tall tales, with one rather special tree.

A monolithic monument in Greater London.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

This peaceful park with centuries of history hides in an overlooked section of South London.

Remnants of a Victorian garden feature sitting in public woodland.

A sculpture of a famous ape who was once a beloved household name in London.