I think this picture relates to retreating to nature in the way that we have an open mind and an open road to travel on when we are out in nature thinking about everything. The road symbolizes the amazing life we have ahead of us.
“Often we hear the teachings so subjectively that we think we’re being told what is true and what is false. But the dharma never tells us what is true or what is false. It just encourages us to find out for ourselves.” --Pema Chodron, Comfortable With Uncertainty