The second route to La Unión runs east through the southern cotton lands. It begins on a four-lane motorway to the airport at Comalapa. The first place of any importance is at Km 13, Santo Tomás where there are pre-Hispanic ruins at Cushululitán, a short distance north. A new road to the east, rising to 1000 m, runs south of Lago de Ilopango to join the Pan-American Highway beyond Cojutepeque. Ten kilometres on from Santo Tomás is Olocuilta, an old town famed for its church and known throughout the world for its rice dough, pupusas. It hosts a colourful market on Sundays under a great tree. Both Santo Tomás and Olocuilta can be reached by bus 133 from San Salvador. The highway to the airport crosses the Carretera Litoral (CA 2) near the towns of San Luis Talpa and Comalapa. The coastal road goes east, through Rosario de la Paz, across Río Jiboa and on to Zacatecoluca.
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