Go to downtown Viņa del Mar, find the "estero" (crap river) and go ahead to the sea. It is next to the Casino, and by the other side, by the hotel-restaurant Cap Ducal.
Warning: This spot is very polluted. Some local surfers from Viņa don't go there, even if it is good, because it's very dirty (Specially after the rain).
Overview
Atmosphere
Needs some swell to break and a good sand bar. Usually it is rideable only after the rains, but not always.