The Venada is the first island that are coming from San Carlos. So long and sweet relief is inhabited in its southern and northern shores. It is located one of the most important archaeological sites in the archipelago: theGoblin’s Cave or Bat Cave Blanco. Located at the level of the lake there are161 images in stone, representing mainly faces, human figures, animals. The cave has two walls. According to research carried out in the area, petroglyphson the west wall are linked to the cult of the dead, by the fact that the figures face east where, according to the culture of the Great Gods reside Nicoya and is located Main paradise. In addition, one of the figures represents a four-legged animal, perhaps a dog. According to the ancient cultures of Solentiname, the dead were accompanied and guided to another world by adog. In the east wall overlooking a great figure symbol of fertility: it assumes that you are connected to the paradise of fertility / water, which was located to the west, to where the figure looks.