Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

This memorial museum chronicles the apocalyptic destruction of the First World War.

Also known as Napoleon's Canal, this waterway was created on the orders of the general, and construction was interrupted by Waterloo.

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

This former coal mine, now a fascinating museum, was the site of Belgium's worst mining disaster.

After the construction of a nearby cathedral obstructed the view, the oldest belfry in Belgium was more than doubled in height.

The tallest church in Mechelen might have been the tallest in the world if not for a lack of funds.

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

The highest cold-water geyser in the world.

The first recognized Neanderthal remains were found in this now-lost cave in 1856.

One of the last remaining railway viaducts equipped with a transporter ferry.

A 1:2 billion-scale solar system leads visitors into this German university town.

This natural "sea of stones" was once used by the Romans as a quarry.

Several of these strange cone-shaped bunkers can still be seen around the former Nazi headquarters.

An old tram depot transformed into a vintage car paradise.

A statue of Vladimir Illyich Lenin guards this abandoned building in the "Forbidden City."

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

Home to the world’s oldest seismograph and a four-ton steel ball that makes its own earthquakes.

This natural hill rose another 130 feet from the debris and rubble added after World War II.

One of the world's oldest fossil exhibits is on display in a beautiful antique "naturalienkabinett."

Oberweissbacher Bergbahn - a broad-gauged cable car capable transfering railcars.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.