Lake Helen and Mount Lassen, 3187 meters, in the background, Lassen Volcanic National Park, California, United States of America, North America

Looking south towards Lake Helen from dormant 10,457ft Lassen Peak, the world's largest plug-dome volcano, in Lassen Volcanic National Park, an area of volcanic activities and features, Lassen Volcanic Park, Northern California, California, United States of America (USA), North America

Lake Helen and the dormant 10,457ft Lassen Peak, the world's largest plug-dome volcano, in Lassen Volcanic National Park, an area of volcanic activities and features, Lassen Volcanic Park, Northern California, California, USA

Lake Helen and the dormant 10,457ft Lassen Peak, the world's largest plug-dome volcano, in Lassen Volcanic National Park, an area of volcanic activities and features, Lassen Volcanic Park, Northern California, California, USA

A large group of boys and girls, teenagers, running across a field, Maryland, USA

Three young boys jumping from the jetty into a still pool of water, Maryland, USA

Mount St Helen's, Mount St Helen's, Washington, USA

Mount St Helen's, Mount St Helen's, Washington, USA

Mount St Helen's, Mount St Helen's, Washington, USA

Mount St Helen's, Mount St Helen's, Washington, USA

Mount St Helen's, Mount St Helen's, Washington, USA

Mount St Helen's, Mount St Helen's, Washington, USA