4k aerial drone footage circling the walls of the Castle of Silves and the beyond cityscape of the historical town of Silves along the banks of the Arade River in Portugal

silves moorish fort fortress castle view wall town aerial portugal touristic algarve tourism hill building landscape city sightseeing mediterranean landmark architecture above outdoor roman urban portuguese cityscape ancient travel destination drone historical arade river 4k european history footage historic church house circling old rural field sky europe lagos blue famous