Grenada is of volcanic origin, as evident in its soil, mountainous interior, and several explosion craters, including Lake Antoine, Grand Etang Lake and Levera Pond. Grenada's highest point is Mount St. Catherine, rising to  above sea level. Other major mountains include Mount Granby and South East Mountain. Several small rivers with waterfalls flow into the sea from these mountains. The coastline contains several bays, most notably on the southern coast which is split into numerous thin peninsulas.