the "devil mountain lakes" are on the seward peninsula. they are a kind of lake called a "maar" which is made by a volcano. the devil mountain lakes are the biggest lakes like this in the whole world. there are four mountain ranges on the peninsula, the biggest ones are the kigluaik (or sawtooth) mountains. the highest point on peninsula is the peak of mount osborn. other mountain ranges on the seward peninsula include the bendeleben mountains, darby mountains, and york mountains. there is also a big lava flow called "the lost jim lava flow". several hot springs are located throughout the peninsula as well.