Kanaga Island Caves

Kanaga Island is a part of the Andreanof Islands group of the Aleutian Islands in Alaska. The island measures 30 miles long and between 4–8 miles wide with an area of 142 sq mi, making it the 42nd largest island in the United States. The island's most notable feature is Mount Kanaga, a 4,288-foot-high volcano which last erupted in 1995.
Data from: en.wikipedia.org