This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

This basement museum explores the art and artistry of fascism.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

The world's longest wildlife overpass provides Hilversum's critters with a safe alternative to trying their luck on the roadway.

An awe-inspiring giant blue whale jaw bone stands in the center of this Dutch island.

A lecture hall sink once used by Einstein and other noted physicists is now regarded as a strange science relic.

For the holidays, the tallest broadcasting tower in the Netherlands turns into one of the world's tallest Christmas trees.

Scale model of St. Peter's Cathedral (Rome) in the middle of a small Dutch town.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

The gargoyles and grotesques of the 21st century are here—22 emoji built into a new building in the Netherlands.

This historic Dutch newspaper building is covered with media-themed details—and one unrelated oddity.

A 1:20 scale piece of the Netherlands commissioned by a queen lets visitors take a stroll as giants.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

The largest flower auction house in the world.

Visit the ancient, mysterious Roman catacombs ... in the Netherlands.

The works of poetry's biggest names grace the walls of the city of Leiden, all carefully painted by hand.

A true Valhalla for cactus and succulent lovers.

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

Live out your childhood construction fantasies in this one-of-a-kind gyrating hotel.

Unchanged for centuries, this medieval library keeps its books in chains.

This miniature take on the Kremlin is one Dutch man's retirement project.