Berlin's old airport.

Two small chapels housed inside an ancient tree.

A 12th-century fortress containing some of Berlin's oldest buildings.

When the rain falls, this drain system turns into a musical instrument.

A stairway to heaven, or to nowhere at all.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A fascinating insight into daily life in the Eastern Bloc.

A collection of abandoned typographic signs from Berlin and beyond.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

An eerie, derelict amusement park in Berlin.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

A striking 12th-century-style castle built on the edge of a cliff.

An engineering wonder at Pillnitz Castle protects a precious 230-year-old flowering shrub.

This tiny German village has staked claim to being the center of the union following Brexit.

The highest cold-water geyser in the world.

A museum that chronicles the history of the Nuremberg Trials for Nazi war criminals in the building where the trials were once held.

Dedicated to the American general whose reply to a German demand for surrender was simply "Nuts!"

Visitors to this Belgium graveyard are greeted by the grieving stone parents of the young men lost to war.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

A Cold War command center is hidden under an idyllic countryside.

This ghost town in Belgium will lose its street art when it ceases to exist.