We need the tonic of wildness . . .

"We need the tonic of wildness. We require that all things be mysterious and unexplorable, that land and sea be infinitely wild, unsurveyed and unfathomed by us because unfathomable. We can never have enough of Nature. We must be refreshed by the sight of inexhaustible vigor, vast and titanic features."

Henry David Thoreau

Photo: Light streaks in the San Luis Valley, CO