Castle of San Sebastián
Cádiz, Spain · built 1706
The Castle of San Sebastián (Castillo de San Sebastián) is a fortress located in Cádiz, Spain, at the end of La Caleta beach on a small island separated from the main city. It was declared Bien de Interés Cultural in 1993.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).