The Apennines or Apennine Mountains are a mountain range consisting of parallel smaller chains extending c. 1,200 km (750 mi) the length of peninsular Italy. In the northwest they join the Ligurian Alps at Altare. In the southwest they end at Reggio di Calabria, the coastal city at the tip of the peninsula. Since 2000 the Environment Ministry of Italy, following the recommendations of the Apennines Park of Europe Project, has defined the Apennines System to include the mountains of north Sicily, a total distance of 1,500 kilometres (930 mi). The system forms an arc enclosing the east of the Ligurian and Tyrrhenian seas.