Museum deep in the catacombs of St. Michael the Archangel Church is explored by touch, sound, and smell.

A narrow strip of land is home to the tallest migrating dunes in Europe.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

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.

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

Strange rumors surround the artist who created these solemn metal guard dogs.

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

A sculpture of the beloved author surrounded by characters from his fairy tales.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

This 2,000-year-old Doric bridge is still open to pedestrian traffic to this day.

300-year-old villagers houses and traditional churches preserve a nearly lost piece of Russian history.

Former headquarters of the KGB.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

This snug medieval lane is one of the narrowest streets in the world.

On the cliffs of São Jorge in the Azores stand the remains of a lighthouse that was struck by a series of earthquakes.

A stunning architectural yet functional feat, towering over Oslo.

The rusted hull of a WWII German destroyer pokes above the surface in a Norwegian fjord.

The burning of this 12th-century church kicked off a campaign of Norwegian Black Metal terror.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

A world-class theater sits hidden in this remote town in West Iceland.

Walk in the footsteps of the gods and straddle two tectonic plates.

The Adriatic's most famous wind can be reliably experienced in the city's Marina.