Climb to the top of its spiral spire for spectacular views of Copenhagen.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Model Trains and Much More in Hamburg.

Striking occult iconography on a medieval German church.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

It houses the remains of a 17th-century version of the Titanic.

This bridge was constructed from the rubble of the infamous Bastille.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

Paris' linguistic guide to the international language of, yes, love.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Macabre astrological automaton clock dating to the late 1400s.

A historic presidential getaway on the continental United States' southernmost island.

12,000 sq. ft. museum tracing erotic art from antiquity to modern times.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The lost American era of gunfighters, bandits, Indians and steam trains is recreated in Sweden.

A Very Low Frequency transmitter you can tune in on your PC.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

This Scandinavian island is the site of the first modern observatory.

Micro-nation based around a nine-story high illegally built tower.