The Tower of Gerro (Torre del Gerro), also known as Torre de L’Aigua Dolça or Torre de L’Arenal, is part of the artistic and cultural heritage of the province. It was rebuilt in 1972 with the costs covered by the Town Hall of Dénia. Thus, it has now been turned into one of its most valued assets of cultural interest. Located in the municipality of Dénia, it is accessed by way of a path, signposted from the neighbourhood of Santa Llúcia onwards.

It is a circular plan construction with cylindrical morphology, built in irregular masonry with stone of local origin, arranged in more or less horizontal rows and put up with lime mortar and white-yellowish gravel.

The tower has two levels and its access opening is elevated, located to the east, facing the coast. Currently, after the last intervention by the Town Hall of Dénia, the tower can also be accessed from ground level due to the fact that a second door was opened.

It has an embrasure that functions as a small bunker on the western side. Below, there is a rhomboid coat of arms with the four-barred flag and crown that represents the Kingdom of Valencia. There is, also, a coat of arms with the inscription "SUB UMBRA TUARUM ALARUM PROTEGEM", which belonged to Bernardino de Cárdenas, Duke of Maqueda and Viceroy of Valencia between the years 1553 and 1558. He was the one who ordered its placement there. The presence of this inscription and the coat of arms confirms its construction as part of the the defensive plan of the viceroy within the Plan for the Protection of the Coast (Menéndez Fueyo, 1996). (1)

(1)Boira Maiques, J. V., Las torres del litoral valenciano. València, Conselleria d'Infraestructures i Transport, 2007, p. 100.