This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

Seat of the Duke and Duchess of Devonshire for centuries.

The Burnside Fountain and its questionable interpretation.

This little-known rival to the Library of Congress houses one of the largest collections of pre-1876 American books, newspapers, and manuscripts.

A grave surprise in the downtown area of New England's second-largest city.

On a side street near the interstate is the building where the famous anarchist once owned an ice cream parlor.

A comic book store got the road by its shop officially renamed after Superman's girlfriend.

This miniature feudal castle was built on a whim to honor a US Navy pioneer.

This is the house that spite built.

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

A fascinating insight into daily life in the Eastern Bloc.

A collection of abandoned typographic signs from Berlin and beyond.

Art and a pun, all in one.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

The palace window through which Protestant nobles flung two Catholic regents, thus sparking the Thirty Years' War.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Millions of numbers carved in glass represent the tattoos forced upon victims.

This small glass cube is a peaceful out-of-the-way sanctuary at the busy airport.

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

No one messes with the Massachusetts sacred cod, not this time...

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.