A relic of Poland's shipbuilding past, reborn as a sky-high lookout.

Monument to a suicide protesting the Soviet invasion.

This artificial cave looks like something out of a fairytale.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

Berlin's old airport.

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

One of the largest vehicles ever built is now open to the public.

The scars of World War II are preserved on its walls.

This old wooden funicular railway leads to a cemetery in the forest.

A park where the Inn and Ilz rivers join the Danube as it slinks off into Austria.

An elevator into the Baltic Sea.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

Ride a dragon train into a world of dwarves.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

Amidst medieval and baroque buildings, five human-sized gherkins stand tall.

A rebuilt Roman city that was once the largest Roman settlement in the region.

An unconventional memorial to the women burned as witches in Bratislava.

A quiet memorial to the victims of the Soviet-backed communist regime in Czechoslovakia.

War-ravaged ruins of a Benedictine monastery founded in the early 12th century, later rebuilt into a fortress.

Art and concrete merge into a single entity within a WWII bunker that possesses a deeply storied and turbulent history.

An Anatolian immigrant created his own little paradise in the shadow of the Berlin Wall, made possible by the tensions of the Cold War.

A mammoth WWII anti-air defense tower has been repurposed as a hotel with a rooftop garden.

Several 12th-century ruins can be found inside this historical market.