There are two areas declared as historic monuments by the Mexican federal government, the historic center of Querétaro and the historic center of San Juan del Río. The historic center of Querétaro has been declared a World Heritage Site by UNESCO. Most historic and cultural attractions are located in the capital. Museums include the Museo de Arte de Querétaro, the Museo Regional de Querétaro, the Museo de la Ciudad, the Museo del Sitio de Querétaro and Museo de la Matemática. Outside of the capital, there are the Museo Histórico de la Sierra Gorda, Museo Arqueológico y Minero de la Sierra and the Museo de la Muerte in San Juan del Río. Another major attraction is its 74-arched aqueduct built in the early 1700s. The aqueduct rises 23 meters (75 ft) above street level and conveyed drinking water to the city from regional springs until 1970. The founding of the city of Querétaro is celebrated in July with various cultural and gastronomic events. Conchero dancers go in procession to the La Cruz Church to commemorate the appearance of Saint James.