National parks in Alaska occupy extensive areas. It is due to the size of the state itself, small population, and, above all, due to the diversity and abundance of the wildlife there. The park is located at the head of the Alaska Peninsula Katmai, on Shelikof Strait. Its area covering ca 16 000 square kilometers amounts to 5% of Poland’s area. The article presents the history of the park, its geological structure (volcanoes) and wildlife.