Photo of Great Sand Dunes National Park, Colorado, United States

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.

Great Sand Dunes National Park, Colorado, United States.