0700302 Tunnel through Chuckanut sandstone, framed by Sword Ferns & Western Red Cedars [Polystichum munitum; Thuja plicata]. Bellingham, Sehome Hill Arboretum, WA. © Mark Turner
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![0700302 Tunnel through Chuckanut sandstone, framed by Sword Ferns & Western Red Cedars [Polystichum munitum; Thuja plicata]. Bellingham, Sehome Hill Arboretum, WA. © Mark Turner](0700302.jpg)