Las grandes riadas del Guadiana en Sanlúcar Historical milestone · Sanlúcar de Guadiana, El Andévalo, Huelva Image of Sanlúcar de Guadiana, not of the place itself. The Guadiana caused floods that destroyed half the town in 1823 and struck it again in December 1875, recurring episodes in the municipality's history. 1823 y 1875 Photo: Dguendel (CC BY 3.0) What to see and do in Sanlúcar de Guadiana