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

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

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

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

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.

Cozy basement bar sports an inventory of over 2,000 beers.

This strange statue features a bust of the famous composer plopped atop a woman's body.

The site of Austria's biggest concentration camp now honors its victims.

A patriotic medieval knight in driven-nail armor raised money for widows and orphans of WWI.

This skeleton-filled altar piece served as a backdrop to one of the most iconic scenes in "The Sound of Music."

The solemn exterior conceals an opulent interior of this 17th century church.

English-speaking soldiers discovered Europe's best one-liner at the end of World War II, before the town’s name changed.

An exquisite Baroque church in Vienna's old town.

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Legends surround an ancient tree trunk riddled with nails for good luck.

Baroque celebration of the end of the Great Plague of Vienna.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

Op-art architecture designed for happiness.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The elliptical citadel resisted the advance of the mighty Ottomans several times, thanks to the military prowess of the "Dragon of Albania."

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.