Moka Lake or Biao Lake is in an ancient volcanic crater, and once served as a sanctuary to the high priest of the Bubis. This small lake-filled caldera cuts the summit of the forested volcano, and a crater lake lies on its northeastern flank. The volcano was classified as having been active during the last 2000 years although little is known about its geologic history. Hike up to Biao Lake, and enjoy the combination of plains, ferns and trees that abound here. Alternatively, if you so desire, walk from the crater down to the edge of the lake.