This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Two stone columns flank the grand Venice square, but there were supposed to be three.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Go inside to really appreciate this 500-year-old technological masterpiece.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

This massive subterranean fissure is known as the "underground Grand Canyon."

A whimsical bridge adorned with decorative dragons.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

This memorial was created by an Irish nurse who lived in New York City during 9/11.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.