Efímurs arises from the collaboration between the Tourism Department of the L'Ametlla de Mar City Council and the funding from the European Next Generation funds for the creation of eleven large-format murals with a variety of styles within the discipline of urban art. The aim is to bring this artistic modality closer to the people of the municipality and to create a correlation of benefits for the participants and the urban landscape of L'Ametlla de Mar itself, which will be improved and committed to art under the motto: 'L'Ametlla de Mar, the most natural cove'.

Given the importance of gastronomic and fishing tourism in the municipality of L'Ametlla de Mar, it is intended to create an initiative for cultural and touristic promotion, an urban art project worthy of the current circuit of open-air museums throughout the Catalan territory.

The main objectives of the festival are to promote good practice of urban art, to value and professionalize the interventions carried out by the selected artists, as well as to create a bond with the citizenship of the municipality that is not only educational but also productive and empowering.