An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The celebrated eyesore created by starry-eyed sweethearts.

The Liverpool street made famous by the Beatles is real.

After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

A marvel of Byzantine engineering under the streets of Istanbul.

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

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

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

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

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