San Juan, capital of the San Juan Province was rebuilt after an earthquake in 1944. Today, the city is characterized by wide, tree-lined streets and fairly modern buildings. Around 60km (38 miles) southeast from here, the small town of Vallecita attracts large numbers of pilgrims who come to visit the famous Difunta Correa shrine (with the busiest times being around Easter and Christmas). The city of Agustín del Valle Fértil is a good base for excursions to the Ischigualasto National Park, a desert valley also referred to as ’the valley of the moon’, owing to its distinctive rock formations and fossils dating back some 180 million years.