A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

This bike path traverses the treetops.

A moving memorial to the fallen and missing from WWI trenches.

This bike path was sunk below water level for maximum wonder.

The Devil’s own choice when he needs a drink in Brussels.

This sprawling Belgian fort was once thought of as impenetrable but now it is simply an abandoned relic.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

A once-magnificent collegiate church is falling into ruin.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

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

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

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

A rare example of World War I trenches from the British front.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

France's national museum of scientific and industrial instruments.

One of the deepest indoor swimming pools in the world.

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Carved fountains poignantly placed in parks and in front of special monuments.

A rare chance to ride one of the few continuous elevators still in operation.

The sweet story of how American cargo planes became known as "Candy Bombers" during the Berlin Blockade.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.