The last bastion of Roman presence north of the Alps looms over a German town.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

A German shoemaker-turned-folk-hero whose impersonation of a Prussian military officer earned international notoriety.

Healing waters from a holy well, previously used by locals for doing laundry.

This small chapel built into rock is the oldest place of worship in Luxembourg.

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

Statues of a fire-breather, a clown, and a whole performing troupe celebrate Luxembourg's creative side.

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

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

The official motto of Luxembourg reminds passersby of the Luxembourgish commitment to their national identity and sovereignty.

A crumbling ghost town with prime views of the dam that doomed it.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

Underground attraction offering tours of the foundational ruins of a church nave that collapsed in 1674.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

The cutest way to stay safe in traffic.

Atop this former dutch railway office sits an interstellar work of art.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

This annual harvest parade features intricate floats covered with fruits, vegetables, and seeds.

One of the largest burial mounds in the Netherlands and Belgium.

This neighborhood of futuristic ball houses looks like an alien settlement in a science fiction film.

Drive past the giant fruit sculptures and up to the window for a menu of fruity treats.

Take a stroll through the hellish grotesques of Hieronymus Bosch in this elaborate Netherlands church.

A rare double mill nestled along the banks of the Aa river.