San Juan is a fairly large city. More than 400,000 people live within the 77 square mile municipality. Yet the two areas of greatest interest to tourists – Old San Juan and the Puerta de Tierra neighborhood – are huddled together on the Isleta de San Juan. This three square mile island is shaped by the Atlantic Ocean in the north and the Bay of San Juan to the south. These Historic and Capital Districts are connected to the mainland by three bridges near Condado.