Rocky landscape in Big Bend National Park, Texas, USA

Scenic desert landscape, Big Bend National Park, Texas, USA

Woman hiking with young son at Big Bend National Park, Texas, USA

Balanced Rock in the Grapevine Hills, Big Bend National Park, Texas, USA

Tourists canoeing on the Rio Grande in Big Bend National Park, Texas, USA

Woman standing at foot of giant redwood tree in Redwood National Park, California, USA

Giant sequoias, Sequoia and Kings Canyon National Parks, California, USA

Family standing in front of giant sequoias, Sequoia and Kings Canyon National Parks, California, USA

Girl hugging large tree trunk, portrait

Children crouching on rock

Big Bend National Park, Texas, USA