The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Super-heavy Nazi architectural experiment.

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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

Grotto replete with mystical designs laid out in glued shell mosaics.

A fully functional, 200-year-old remnant of the time when Brixton was mostly fields.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

This secret garden has bloomed into London's most unique hub of urban creativity.

This toxic spoil heap found a second life as a ski slope, popular film location, and wildlife haven.

A statue of the original Pearly King is hidden in a church's crypt.

A unique tribute to the millions of animals who served and died for the British military.

London's amazing modernist public square that never was.

This lush area was the site of extensive enemy bombing during WWII.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

It is still illegal to "quarrel" at this unlikely urban oasis built on top of an electrical substation.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

This religious museum resides in a church crypt next to the founder's house.

A tribute to the intrepid explorer and his crew who perished in terrible conditions on an ill-fated expedition to the Arctic.

East London art gallery showcasing contemporary art from Europe's Eastern Bloc.

London's most popular recording studio, located in the capital's East End, runs partly on solar power and has played host to some of the world's biggest acts.

This historic London residence was once the womb of Scientology.

Black cat statues guard this temple-like Egyptian revival factory.

The grounds of this Jacobean estate contain one of the oldest mulberry trees in England.