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

A former ironworks that was the first UNESCO industrial site.

Most powerful transmitter in Germany only broadcasts in the French language.

20kV overhead line with a garland-like cable.

Power line with pylons on huge concrete bases to prevent terrorist attacks.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

Europe's "only museum dedicated to the decapod" is full of quirky and absurdist displays, including one featuring the "famous" Giant Crab of Margate.

The largest offshore wind farm in the world would be even bigger if it weren't for some pesky birds.

Grotto replete with mystical designs laid out in glued shell mosaics.

Climb inside an iron crystal magnified 165 billion times its normal size.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

A two-way chairlift system between Zugliget and the highest point in the city.

Artist Diego Morlin's war between the natural and human worlds is a wanderer's delight.

Machismo turned on its head: the lady's hand goes to the dude with the bigger brain.

A modest museum in the final home of Italian poet and father of modern Italian, Francesco Petrarca.

Turtles swim in a pond surrounding a classical temple in this lush park in Vicenza.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

Featuring the last fully walkable parapet walkway in Europe.

Constructed along the shores of Lake Zurich, this pavilion is a walk-through work of art.

Crop circles inspired this whimsical garden in Germany.

Alabama has a fiberglass Stonehenge. With apologies to Spinal Tap, this one is full-size.

A relic of the Cold War tucked away in the forested hills above Bratislava.

One of two electrical towers in Germany that have a pathway constructed through the tower's legs.