The Bulgarian Black Sea Coast (Bulgarian: Черноморие, Chеrnomoriе) covers the whole eastern bound of Bulgaria. Black Sea Coast beaches occupy approximately 130 km of the 378 km coast. The region is an important centre for tourism during the summer, drawing foreign and Bulgarian tourists alike and constituting one of the country's most popular tourist destination, internationally known before 1989 as the Red Riviera. Since the fall of the Iron Curtain, its nickname has been changed to the Bulgarian Riviera. The area's average air temperature in the summer is about 28°C, with the average water temperature at 25°C. There are more than 240 hours of sunshine in May and September and more than 300 hours in July and August. The Balkan Mountains cross the country reaching to the edge of the Black Sea at Cape Emine, dividing the coastline into a southern and northern part. Parts of Bulgaria's northern Black Sea Coast feature rocky headlands where the sea abuts cliffs up to 70 metres in height. The southern coast is known for its wide sandy beaches. The largest city on Bulgarian Black Sea Coast is Varna (also the third largest city in Bulgaria), located on the northern part of the coast. Another big city is Burgas, located on the southern coast. The two cities' international airports, Varna Airport and Burgas Airport, are the main hubs servicing the region. In addition, the A1 and A2 motorways, currently in construction, would make the trip from the capital Sofia to the coast substantially easier and faster, while the A3 is planned to connect Varna and Burgas.