Where is the oldest lighthouse in use located?

The Tower of Hercules is an ancient Roman lighthouse on a peninsula about 2.4 km (1.5 mi) from the centre of Coruña, Galicia, in north-western Spain. he structure is 55 metres (180 ft) tall and overlooks the North Atlantic coast of Spain. The structure, built in the 2nd century and renovated in 1791, is the oldest lighthouse in use today.

The Tower of Hercules is a National Monument of Spain, and has been a UNESCO World Heritage Site since 27 June 2009. It is the second-tallest lighthouse in Spain, after the Faro de Chipiona.

Through the millennia many mythical stories of the lighthouse's origin have been told. According to a myth that mixes Celtic and Greco-Roman elements, the hero Hercules slew the giant tyrant Geryon after three days and three nights of continuous battle. Hercules then—in a Celtic gesture—buried the head of Geryon with his weapons and ordered that a city be built on the site. The lighthouse atop a skull and crossbones representing the buried head of Hercules’ slain enemy appears in the coat-of-arms of the city of Coruña.