bridge corridor downtown elevated minneapolis minnesota mn pedestrian pedway skywalk skyway walkway adobe stone bohol church historic ruin ruins spanish stone wall aerial-walkway angle angled angles arial-walkway barrier footbridge height high higher inclining light mesh metal overpass path patterns perspective perspectives protection protective public raised rising safe safety secure security shadow shadows sloping stable steel strong sunlight sunshine support supported tree-top bushes flowers foliage footpath gravel park shrubs summer trees walking arch arches lake lillies plants pond stone water beach caribbean cuba decking holiday ocean scene sea sun trees green warm water tropical boardwalk ivy marsh pathway platform trail wales woods cover covered open-sided paved paving pedestrians people posts ribbing roof roofing rounded shelter