Ravine of Aigua Oliva of Càlig Nature · Càlig, El Baix Maestrat, Castellón Image of Càlig, not of the place itself. A 1.5-hectare flora micro-reserve declared in 2003 in the ravine that marks the boundary between Càlig and Vinaròs, with 109 species of vascular flora, among them holm oaks and rare endemic species of the Maestrat. 2003 Photo: Columbusalbus (CC BY-SA 3.0) What to see and do in Càlig