An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

The symbolic center of Ireland, this summit also offers panoramic views of the countryside.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

The oldest trees in Northern Germany.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

Stockholm's deepest subway station is also a stunning ecological wonder.

A fiery crater has been burning in the Karakum Desert since 1971.

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

The world's only museum devoted to the wonders of fluorescence.

The only microgravity tower in Europe can produce nine seconds of weightlessness.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

The ruins of an abandoned crematorium haunt an eerie deserted German cemetery.

Retirement home for giant obsolete machines.

Terrifying derelict military hospital once housed a recuperating Hitler.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

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

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

This little museum is making sure that the art and history of the graffiti sticker is not scraped from history.

A century-old shot ball factory tower is open to the public once a year.

An elevator into the Baltic Sea.

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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.