Time For Impact is an online platform that promotes urgent challenges in the built environment to boost socially relevant projects. With many projects already submitted online and many more to come, the event will create the conditions to bring the discussion further, presenting the results of the open call and giving visibility to all the challenges. Esperimenti Architettonici attended the event presenting #SottaninRete, the challenge submitted on the platform in order to promote the reactivation of the former dismissed basements -called "sottani" - in the historical city center of Altamura.