Heavy rain can cause havoc on a training pitch, leaving it entirely unplayable.
So when Spain got to Miami ahead of the Confederations Cup to begin their preparations for the tournament, they would have been disheartened to learn that the weather in Florida hadn't exactly been perfect recently.
So then what happened? Well rather than going to a nearby sports centre or just call the session off the Spaniards were able to call in a few favours and train in incredible €8 million inflatable dome that took two weeks to blow up.
It appears as though it did the trick too - the reigning world champions secured a 2-1 win over Haiti yesterday.
Check out the space-age facility in the video below!