This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Architectural monsters are devouring this palace's every door and window.

The once forbidden "secret cabinet" of erotic art from excavations of Pompeii and Herculaneum.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Legend said this huge, gnarled tree sheltered the saint during a storm.

A haunting collection of sunken wooden barges litters this Italian river bend.

Drink wine handed out through a window as part of an age-old tradition.

A stunning medieval castle houses this eclectic, interactive tribute to all things wine.

This poignant art installation raises awareness of violence against women.

The oldest scientifically dated tree in Europe lives on a remote cliff.

A collection of wax anatomy by the great sculptor Clemente Susini.

Climb the dead electric pylons of Messina.

Massive galleon from a box-office bomb docked in Genoa.

This Neapolitan exhibition hall grants weird and wonderful insight into the intricacies of human biology.

While most books are made of wood, these wooden books are truly made of, and all about wood.

One of the most important yet well-hidden museums dedicated to the history of medicine.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

The only substantial part of Nazi Germany's formidable defensive line through Northern Italy that survives today, largely intact.

Caligula's colossal pleasure ships, discovered by Mussolini only to be lost in flames.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

The bright red cars take travelers through breathtaking Tuscan scenery.

A cherry tree growing atop a mulberry tree.