The patron saint of spinsters grasps a container of dried blood.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A semi-sterile mutant birch that became Sweden's national tree.

This small museum nestled inside a souvenir shop is dedicated to Sweden's most well-known toy.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

This church carved into the rocks is full of enchanting stone statues.

Unscathed for almost 2,000 years, the best preserved Roman triumphal arch is in a small southern Italian city.

Geometry and mystery come together in an epic show of octagonal masonry.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

For decades, vendors have sold clothes once worn by American soldiers who stormed Italy in the 1940s.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

An ancient fortification lives on in this Chinese city.

According to local folklore, this Roman sepulcher was once a throne for the Devil.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

This advertisement for talcum powder was painted on the rock face and has since defied removal.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.