Russ Sprague:
Sandstone columns, US National Arboretum
Russ Sprague:
Sandstone columns at the US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
Sandstone columns, US National Arboretum, Washington, DC
Russ Sprague:
070
Russ Sprague:
069
Russ Sprague:
068
Russ Sprague:
066
Russ Sprague:
Sandstone columns, US National Arboretum