Places Shastified Wants to Go

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This series of Scottish caves has no clear purpose other than baffling historians.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

A spooky spot along the road where things mysteriously seem to move uphill by themselves.

Gigantic Romanian salt mines used to heal respiratory conditions.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

A muddy alien landscape that is home to rare species of exotic plants.

No one knows who built this strange cave of worship or exactly why.

This massive underground salt mine now holds a sci-fi theme park in its depths.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

One of Europe's largest supercomputers is housed inside of a disused chapel.

A temple to modernity, tucked away amid Barcelona's more well known museums.

Week-long block party becomes a competition for the best decorated street.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

A beautiful but toxic fountain of mercury.

A Serbian church lit by chandeliers made of weapons.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

A beautiful mountaintop mausoleum devoted to a Montenegrin icon can't seem to make everyone happy.

On top of a resort town as old as the Bronze Age sits an incredible war memorial statue overlooking the beaches below.

Now abandoned, the world's first torpedo factory is crumbling into the sea.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.