Juliaca (Spanish: Juliaca, Quechua: Hullaqa, Aymara: Hullaqa) is the capital of San Roman Province in the Puno Region of southeastern Peru. It is the region's largest city with a population of 225,146 inhabitants (2007). On the Altiplano, Juliaca is 3,825 metres (12,549 ft) above sea level, is located on the Collao Plateau and is northwest of Lake Titicaca (45 km). It is the largest trade center in the Puno region. Juliaca is near Chacas lagoon, the Maravillas river, and near the ruins of Sillustani. The city hosts Juliaca's Carnival each year between February and March. During this very popular event participants, dressed in colorful costumes, gather on the streets to dance in the style of the Collao Plateau. Saint Sebastian's feast occurs on January 20 of every year. Juliaca's citizens rely on cars, trains, and bicycles. It is a major transit point in the region and has strong ties with Peru's southern cities, including Arequipa, Puno, Tacna, Cuzco, Ilo, and with La Rinconada and Bolivia. Like Chicago, Illinois, it is nicknamed "The Windy City", because of the city's location on the windy Collao Plateau. It is also called the "Sock City" or "Knitting City" because Juliaca was a major center of sock, sweater, and handicraft production. Now the production of clothes, wool and fabrics are industrial processes. It is also home to Inca Manco Capac Airport, the region's main airport.