Dordogne is a départment in south-west France. The départment is located in the region of Aquitaine, between the Loire valley and the High Pyrénées named after the great river Dordogne that runs through it. It roughly corresponds with the ancient county of Périgord. There are more than 1,500 castles in Dordogne. The famous caves of Lascaux have been closed to the public, but the duplicate model cave of Lascaux II is open to visitors and is a major tourist attraction. Périgueux has important Roman ruins, including an arena which is still visible inside a public park located near the town centre.