A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A book bound in the skin of an infamous criminal, along with countless other specimens.

This early version of the guillotine was used to execute the man responsible for its construction.

This small museum in a 17th-century building honors three iconic Scottish writers.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

Original cabaret handbills, posters, and feline artwork are a purrfect highlight of the Museum of Montmartre.

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 bridge was constructed from the rubble of the infamous Bastille.

The history of radiation is on safe display at the foot of a radiation science laboratory.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

A surrealist timepiece by the artist of melting clocks.

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

A mechanized clock where a man fights off a dragon, crab, and rooster.

This modest marker near Notre Dame identifies the very center of Paris.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.