Córdoba

Córdoba's Mezquita houses the most visually stunning interior in Spain, with 856 double-tiered arches crafted from jasper, onyx, marble, and granite. This unparalleled design, originally built as a mosque in 784, later expanded with a cathedral nave, creates an endless rhythmic pattern that draws 1.5 million visitors annually. In scale and historical depth, the Mezquita outshines even Toledo's Gothic cathedral, offering a more profound fusion of Islamic and Christian artistry.