Ésera

The Ésera (Spanish: [ˈeseɾa]) is a tributary of the Cinca in the High Aragon.^[1][2][3] It is part of the valley of the Ebro and its drainage basin. Its etymology is Celtic and it is cognate with several European rivers: Isar, Jizera, Isère, Isel, IJssel, and Eisack.

The river as seen from a foot bridge

The Ésera and the Cinca in the basin of Ebro