This extraordinary Viking artifact has traveled throughout the city.

This pair of unsuspecting buildings are in fact the very first modern skyscrapers in Europe.

A small museum that celebrates the history and culture of the LGBTQ community in England.

This abandoned Slovenian military barracks has become a punky-political art squat.

A whimsical bridge adorned with decorative dragons.

A public work of art that also provides some relief from the summer heat.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

This 135-year-old weather station studied the effects of the climate on human health.

This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

Where the lovelorn find a home for their sentimental keepsakes.

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

This statue celebrating everyday life in Dublin has a few unsavory nicknames.

At the time of its construction, this hydroelectric power plant was the largest in the world.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

The block of aged dairy is probably still edible after 2,300 years in a peat bog.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

An accidental trick of light casts the perfect shadow of a pilgrim of the Camino de Santiago against the cathedral wall.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

This former power station is now a museum dedicated to the region's coal-producing history.

This stop on the Camino de Santiago stands high above the underwater ruins of a medieval town.

This enormous censer uses a pulley system installed over 400 years ago.