One of the major attractions on Los Caminos Antiguos Scenic and Historic Byway, the Great Sand Dunes National Park is famous for huge sand dunes more apt to be in the desert instead of in southern Colorado surrounded by majestic mountains. More unusual, Medano Creek creates a beach at the base of the dunes. The Medano Pass Primitive Road winds through a canyon to the Sangre de Cristo Mountains. Visitor Center, 11999 State Highway 150, Mosca, Colorado.