The world's first invisible city square is an homage to a man who pushed the boundaries of art.

Described as one of the Baltic region’s most daring and original construction projects.

Launch site for nuclear war against Western Europe.

Sculpture garden of religious statues made it through Soviet rule.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

Lithuania's outdoor sculpture trail of wooden folk art.

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

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

Longest fortress system anywhere in Europe.

The Renaissance-era courthouse is a relic from the fortified town's centuries of Venetian rule.

Yugoslavia's biggest underground airport lies in ruins.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

The largest fountain in Bratislava.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

The mile-long pier stretches from a ruined fortress out into the Baltic.

These crumbling Latvian forts make for some haunting seaside ruins.

This ornate church has survived Nazi and Soviet occupation, including a short stint as a Soviet-era gymnasium and cinema.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

An impressive ensemble of sculptures that survived the Soviet regime.

A narrow strip of land is home to the tallest migrating dunes in Europe.

Flamboyant architecture from the turn of 20th century.