The Air-raid shelter of Dalmau Park started to work in 1937 in order to protect the civilian population from the air attacks. It had a capacity to shelter 3.600 people. It is part of the Memorial Spaces Network of Catalonia and in 2010 was restored and signposted in order to open it to the public. It is a cultural good of local interest by means of which it is possible to get to know one of the most important chapters in the history of Calella: the civil war. As of today, the shelter is a vestige which represents the fight for achieving the democratic rights and liberties in Catalonia.