Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Retirement home for giant obsolete machines.

Two whaling vessels that were sunk by an anti-whaling organization in 1986 now sit on the shore of this beautiful fjord.

A walkable map of the world, made from soil and stone by one man.

A natural wonder in south Denmark.

The world's first combination ski slope and power plant.

Where the sleeping monsters of Scotland's oil industry are left to rust.

Brought to you by the makers of fiberglass dinosaurs.

Surrounded by ash fields in Iceland, an impossibly verdant valley looks like something out of a fairytale.

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

A popular Icelandic children's story comes to life inside this cave.

This wild explosion of color on a disused water tower tells the whimsical tale of a curious puffin.

This aromatherapy shop and mini-museum cofounded by the Sigur Rós frontman documents Icelandic history through scents.

The largest whale museum in Europe allows visitors to walk among life-size giants.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

This Viking-inspired miniature golf course features a pirate ship and views of Icelandic landscapes.

This 17th-century "unicorn" was cobbled together from the skull of a rhinoceros, the legs of a mammoth, and the horn of a narwhal.

A massive 1830s industrial site once known as Czechia's "Iron Heart" has been transformed into a playground of science, technology, and art.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

One of only two places in the world where two rivers cross each other without the waters mixing.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Stroll past dozens of intricately-detailed scale replicas of buildings from all over Czechia.

A 20-foot-tall egg painted in a traditional Czech patterns by the Czech community in Wilson, Kansas.

A former medieval fortress, now home to Edinburgh Napier University, contains a rather risqué work of art.