This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

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

The underground sanctuary of a mysterious ancient cult.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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

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

Fantastic views and thousands of love locks.

A serious museum dedicated to two German comedians.

This famed marionette theater and museum is bursting with imaginative string puppets.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Hamburgers are intensely proud of their tunnel beneath the river.

Metro station with a claim to rock n' roll fame.

A small square plaque marks a failed assassination attempt that could have changed history.

Over 12,000 hygiene oriented objects and exhibits.

Tiny castle in the middle of the Rhine made you pay to pass.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

This contentious squat has stood through fire, violence, and government intervention as a hotbed of leftist protest.

A preserved college lock-up that recalls a clubhouse approach to discipline.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

Go surfing on this urban wave, "hacked" by local surfers.

This lurid German fountain plots the sad course of marriage from dating to death.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.