Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

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

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

Pilgrimage site for star-crossed lovers.

This medieval castle was reconstructed by Carlo Scarpa.

It’s said this crypt was the setting for the tragic finale of the Shakespeare play.

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

An iron dragon with a long neck covered in feathery scales perched above one of Venice's most popular squares.

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

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

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

When this monument to Slovenia's national poet was erected, it's said to have sparked the ire of nearby church authorities.

A public work of art that also provides some relief from the summer heat.

This lush, scenic spot was carved by the turquoise waters of the Radovna.

This one-time health resort was used by aristocrats around the world.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A restaurant devoted to "trouser grip" wrestling, an ancient form of Viking wrestling that is Iceland's national sport.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

A home for skateboarders with sweeping views of the Atlantic Ocean in Morocco.

Covering 13 acres and hosting 3,000 shops, this is one of Africa's biggest urban markets.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.