Tower of Hercules, Spain - An ancient Roman lighthouse 2.4 km (1.5 mi) from the city of Corunna, in north-western Spain. This ancient lighthouse is 55 metres (180 ft) tall and almost 1900 years old. It was rehabilitated in 1791. The Tower of Hercules is the oldest Roman lighthouse in use today. It is a National Monument of Spain, and a UNESCO World Heritage Site