In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

Nicolas Schöffer's massive interactive sculpture was assembled in 1961 and brought back online in 2016.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

A beer pipeline runs beneath Bruges.

This mine is home to the largest man-made hole in Europe.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

A tribute to the first human in space.

An impressive monument to Poland's independence.

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

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

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

A particularly disconcerting tribute to Irish martyrs.

The modern birthplace of Irish freedom.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

These engineering masterpieces are a dominant feature of the Belfast skyline.

This massive monument has been telling the time for 150 years—at a slight angle.

It was once nicknamed "the most bombed hotel in Europe."

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

Belfast's namesake river still winds below the city center, hidden from sight.

The only monument to name all of the passengers and crew who died on the RMS Titanic.