Leona (or Mountain Lioness) Springs (Texas)

Leona (or Mountain Lioness) Springs is actually four groups of springs on the Leona River in Uvalde County, the first just southeast of Uvalde and the last seven miles southeast of the city. The springs rise under artesian pressure from the limestone of the Edwards aquifer, recharged by the Nueces River and streams to the northwest. The spring flow generally lags behind the rainfall by several months. The four main groups of springs once flowed from a higher level, but nearly all the springs are now beneath the surface of the river.
Source