Two standing giants remain as a tribute to Luxembourg's metallurgical past.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

Medieval irrigation channels built into the sides of mountains provided Valais with water for hundreds of years.

Large Hadron Collider and the Birthplace of World Wide Web.

World's largest permanent maze made of 18,000 conifers.

A fairytale island floats in the middle of Italy's little-known Lake Orta.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Bridge that died in war and was resurected.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The prototype for all Nazi concentration camps.

This abandoned coliseum was intended to be a grand Nazi rallying ground before it was halted at the end of the war.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

Regency-era excess on the English Coast.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

The natural history museum displaying the British bird collections and dioramas of Edward Booth, free of charge.

An octagonal folly tower overlooking the sea.

Old Tudor home moved on thick iron rails to a new spot.