This small islet off the southeast coast of Santiago Island is a moderately recent volcanic cone that gets its name from its shape, that resembles a Chinese hat. Consisting of lava tubes and pillow-type lava formations, indicating that the flows were formed under the sea and rose upwards, this island is a great way to understand and experience different geological features firsthand. The islet’s 400-meter trail begins at a small white-sandy beach where sea lions and oystercatchers dwell, passing through the lava fields where is possible to appreciate the lava formations very close.