Mad Cool Festival is back! The Spanish weekender is widely considered to be one of the best modern day music festivals, and with a line-up as massive as theirs it isn’t hard to see why. 10+ headliners, an undercard featuring the headliners of the future and some of the finest music Spain has to offer all stand equally central on the stacked poster. We’ve sent Virginia Barbero to Madrid to capture some of the week’s best performances. Here’s a look at what day one had to offer.