A rising drone shot of an abandoned military garrison situated behind a seawall on the edge of beach and mudflats on a tidal estuary at low tide, on a clear and hot summer day

rise rising drone fly flight old wooden groyne beach mud mudflat estuary tide tidal green algae seaweed water sea nature ripples brown blue sky small white clouds reflection mirror shadow natural environment abandon military garrison gunners park shoeburyness essex wet home house estate low summer day ship transport thames river