a low-flow riverbed attracts people to build mounds, hills and dams, which are broken again by waves during a flood. artificial hi

again are artificial attraction attracts bank beach block bollard brake broken build closeup coast cobblestone creativity dams ducks embankment flood floodplain flow flowing footpath grass hexagon hills lake landscape landscaping large lowflow mound mounds pagoda people pier pile pillar pillars river riverbed rivers shape shoreline slabs stack stacked stone summer swimming symbol terrace texture tropical valentine wall water waves which young zag zig