I can't remember the name of the company but they are right across from the marina and the hotel Finestera. Awesome!!! They get a convoy of the ATVers together and you ride to the sand dunes. The dune is right off the coast. You enter at the top of a hill. Looking down, the dune spreads out before you, beyond the dune the ocean roars. The salty wind whips around you as you plunge into the dune at 35mph! You ride for about 40 minutes before they round you up and take you back! Not too expensive, and worth the memories.