Massive rock sculptures formed during the time of the dinosaurs still stand undisturbed.

The celebrated eyesore created by starry-eyed sweethearts.

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.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Perhaps the tiniest sculpture in Saint Petersburg is a little bronze finch inspired by a song.

The past, present, and future of Russia's signature alcohol is remembered in the world's only museum dedicated to the starchy spirit.

Inside the world's largest seed bank, WWII botanists elected to starve to death rather than compromise their collection.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

A saintly relic hidden in a Prague church basement.

Be(w)ar(e) the moat around this historic Czech castle.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Venice's island of the dead.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

Da Vinci's equestrian statue, 500 years in the making.

Ham is serious business at the Prosciutto Museum-Serious, delicious business.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

Breathtaking and huge 430 year old maps of Italy.

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

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

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