4K repurposed old tires as fender for boats to dock in the ria de Aveiro in the estuary of the river Vouga

ria de aveiro 4k old muddy texture riverbank surface dirty tide out mudflats estuary running water water level shoreline exposed environmental waterline outdoor background tides coastal dryness low water flow riverbed riverside climate stone idyllic river water tide scenic coastline nature sand stones mud natural low tide water coast beach landscape river tires repurposed fender dock reused