With a history stretching back nearly three millennia, Carthage was once the heart of a powerful Mediterranean empire before being leveled by the Romans in the Third Punic War in 146 BC. It sprang from the ashes to become an important early Christian center before again being destroyed by Islamic invaders in the late 7th century. Now a UNESCO World Heritage Site, Carthage is a short train ride from Tunis and has several interesting attractions, like the Punic port and the Carthage Museum.