The deep blue waters of Crater Lake in Oregon's Crater Lake National Park. Formed more than 7,000 years ago when a massive volcano called Mount Mazama collapsed on itself, Crater Lake is one of the deepest lakes in the world.
Credit: Zainub Razvi/Wikimedia
A view from Watchman Overlook, one of the stops on the spectacular Rim Drive encircling Crater Lake.
Hillman Peak towering over prairie grass in Crater Lake National Park. This peak marks the highest point on the caldera, the ring of volcanic rock surrounding Crater Lake that remained after the collapse of the volcano Mount Mazama.