An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A centuries-old stone pagoda from Japan stands among cherry trees beside the National Mall Tidal Basin.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

This is not only one of the oldest collections in Europe, but also possibly the most beautiful.

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

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

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

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

This Parisian gem is one of the most incredible ethnographic museums in the world.

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This emotive sculpture was originally created for the 1878 World's Fair.

Revitalization efforts converted a former U.S. military heliport into a sprawling urban park.

Geothermal waterfalls in Tuscany.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

This network of roads is one of the most unique Etruscan creations ever discovered.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

The atomic museum in the basement of this German castle displays long strands of replica uranium cubes.

The first official clock in North America, it kept time for the Spanish government of Santo Domingo.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

The final resting place of Christopher Columbus - or possibly someone else.

After Christopher Columbus died, his son built a fancy house to rule from.

Built to test magnetically levitated elevators, the tower also boasts Germany's highest visitor platform.

Bloodstains can still be seen in this medieval church where two medics saved lives on D-Day.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.