I had already written about the psicobloc in Altafulla that is next to Platja de Canyadell. In fact, Platja de Canyadell has two awesome places for deep water soloing (Go to Psicobloc 2). One on each site of the beach (map below).
There are no topos available for either of the two places but they are superfun to check out, explore, look for routes and take some falls. The second psicobloc (just north of the beach) has a height of about 10 meters, the water is very deep and the routes are overhanging.
More deep water solo near Barcelona.