The park 's chief features are its coast and a series of large lakes in the flatter western part of the park .
Its coast is the Aleutian Range with a chain of fifteen volcanic mountains across the coastal southeastern part of the park .
The park 's chief features are its coast , the Aleutian Range with a chain of fifteen volcanic mountains across the coastal southeastern part of the park , and a series of large lakes in the flatter western part of the park .