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.

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

Christ's blood preserved in a Belgian town.

Climb inside an iron crystal magnified 165 billion times its normal size.

A little sculpture with a large wardrobe.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

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

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

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Water and windows define this defensive Italian well.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The Pope’s secret escape route.

A rather vulgar example of the transition from Latin to the Italian vernacular.

A Nesting Doll of Churches.

Five candy-colored villages on the Italian Riviera.

Where Venice's gondolas go for a tune-up.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.