In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Ancient serpentine sacrifice holder that has stood the test of time.

The most metal church of all time was built in record time because of an international, pious pissing contest.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

Unusual building appears to be haphazardly built from randomly piled bricks.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

A museum glorifying the life of Stalin, located in the city of his birth.

Ancient rock-hewn town that witnessed key events of Georgian history.

Fortified homes of highland warriors that are still in use today.

Despite being tiny and rural this Georgian airport looks like a sci-fi boondoggle.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

Underground monastery and fortress.

Giant stone letters dedicated to the founder of Armenia's alphabet.

Eighteen mummies have stood guard behind the altar of this tiny church since 1833.

The final resting place for the remains of 143 Habsburg royalty.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The Cathedral of St. Ambrose has been hiding a special parishioner within its walls.

This half-finished "city of toys" was almost Italy's own Las Vegas.

The mark of the Devil's horns on a marble column in Milan.

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

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

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.