This ornate Weser Renaissance house was also the home of an infamous witch hunter.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This is the oldest Roman-made bridge in the city still existing in its original state.

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

This curious, round temple is the oldest still-standing marble building in Rome.

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

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

A small concrete monument remembers a German cold case involving incest, farm tools, and psychics.

A whimsical art tower at a Bavarian brewery includes a grotto for its mythical beer-brewing dwarves.

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

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

A quartet of brightly colored mythical beasts stand sentry at this gateway.

A miniature model of what will be the world's largest telescope.

A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

The hilltop ruins of a border fortification in the Italian Alps that was much fought over.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

This amazing medieval fortress stands atop a promontory along the famous Cinque Terre.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

According to legend a man pooped out the window of this tower to prove that it was straight.

What appears to be an ordinary bridge is actually a rare aqueduct.

This statue of the great Argentinian car driver is located near a famous curve of the Monaco Grand Prix.

A massive marble foot is tucked away in a small alley near the Pantheon.

This sculpture commemorates the first instance of an American president pardoning a turkey.