Short piece from Daniel Oberhaus at Motherboard about a former church in Barcelona, Spain that is now home to a supercomputer:
From the outside, Torre Girona Chapel at the Polytechnic University of Catalonia in Barcelona looks like any one of the thousands of old churches that can be found throughout Spain, with a large cross mounted on the roof and a rose window perched above the entrance. Step through the chapel doors, however, and you won’t find any religious iconography or a congregation in prayer.
Instead, you’ll find the 25th most powerful supercomputer in the world: the MareNostrum 4.
Totally seems like the kind of thing that would show up in a William Gibson or Neal Stephenson book.