BAT ISLANDS
Top 3 in Top 7 Best Dive Sites in Costa Rica
The Bat Islands (or Islas Murcielagos, as they're known locally) are another good option for divers in the Guanacaste region and are also accessible from Playas del Coco, and is one of the Best Dive Sites in Costa Rica. You'll need a lot of guts, though, because this is the habitat of the enormous bull shark, and it's one of the few sites in the world where you can dive with the species without being in a cage. The bull sharks naturally concentrate around a location known as the Big Scare.
Safe diving methods necessitate a swift drop, followed by a dive spent finning about the rocky seafloor in search of sharks. Visibility can range from as high as 100 feet/30 meters one day to as low as 16 feet/5 meters the next. The Big Scare isn't the only dive spot worth seeing; Bajo Negro, a rocky pinnacle noted for its school's gamefish and possible manta sightings, is another.
Location: the Pacific Coast of Costa Rica off of the northern province of Guanacaste