For 15 points, name this third-smallest Mexican state whose name is Spanish for "hot waters."
This state's city of Calvillo is a major center of the guava industry. Other sights here include the Cerro del Muerto and the ghost towns in its northern region of Tepezala. The San Marcos Fair takes place in this state, which is the site of a museum devoted to the broadsheets produced by Jose Guadalupe Posada.  Its capital, which shares the same name as the state, was the location of a 1914 convention called by Venustiano Carranza but soon taken over by Villistas. It is located between (*) Zacatecas, from which it separated in 1857, and Jalisco. For 15 points, name this third-smallest Mexican state whose name is Spanish for "hot waters." 
This state's city of Calvillo is a major center of the guava industry.
Aguascalientes