Museum devoted to the artificial language of Esperanto.

A silly medieval mural preserved on the side of a Viennese house.

Handsomely crafted representations of our round planet.

This museum is dedicated to the little known ancient Roman history of Vienna.

As part of a larger public art project, three pillars honor the past of Wincobank.

Seemingly straight out of a fairy tale, a steel chair sits on a tiny island only accessible by stepping stones.

A brick foundation and piles of listing building materials are all that remains of this World War II POW camp.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This series of Scottish caves has no clear purpose other than baffling historians.

A 30-acre garden inspired by the principles of modern physics.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

The longest and tallest aqueduct in Britain can actually be sailed across.

17th century puritan church with connections to the Salem Witch Trials.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

The grand complex of buildings that comprise Liverpool's Exchange Flags includes a vast World War II bunker that has been frozen in time.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

This whimsical public art installation is a unique homage to Liverpool's industrial heritage.

This abandoned lock-up was saved because of its connection to a local football team.

A typographic tribute to the many comedic greats who make Great Britain laugh.

This sculpture is an instrument played by the swell of the seas.

One of the oldest amusement rides in existence was a huge disappointment to its creator.