Riserva Naturale Integrale Saline di Trapani e Paceco
Trapani - Sicilia - Italia
This is the "Nubia Tower". One of the 150 watch towers built by the Viceroy of Sicilia in 1584, to alert neighbouring towers and towns impending attacks of Turkish barbarian incursions by flashing mirrors, and at night, via fireworks.
More Sicilian towers: