A reconstruction of a classic mansion on the island of Delos was designed for a historian and archaeologist.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

Lyon's "Wall of the Silk Weavers" is one of the largest murals in Europe.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This ancient theater was once the home of fierce gladiatorial battles.

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

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

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

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

A Gothic cathedral created from volcanic rocks.

Historic medieval fortified city in southwest France.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Hundreds of hidden passageways weave through the old quarters of Lyon.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Every summer, an open-air swimming pool appears at the base of a Finnish city's beloved winter attraction.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

A 246-foot-high revolving restaurant rises unexpectedly from a forested Finnish hilltop.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

A subterranean house of worship carved right out of the bedrock.

The narrow passages will challenge even the bravest driver.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .