Castell d'Eslida dominates a hilltop south of the town of Eslida in La Plana Baixa comarca of Castellón province, at the center of the Sierra de Espadán. This medieval fortress features a distinctive triangular floor plan with twin angular corner towers serving as defensive structures—a rare architectural form of which only two examples exist in the Valencian Community. The castle's current visible structure dates from the Muslim period and represents the strategic seat of the 'Alcadiazgo de Eslida' during Islamic rule. Conquered by King James I between 1238 and 1239, the fortress remains in progressive ruin but preserves its unique triangular design.
