Punta Argentina is a great dive site for macro lovers. Look for the harlequin shrimps and frogfish. Nonetheless, it also offers some larger marine animals such as stingrays.
The site is reachable by boat from Playa del Coco, Guanacaste. Suitable for all divers, with an average depth of only 10 meters/32 feet. Good visibility, but the current can get strong.