The Castle of Caseres Monument · Caseres, Terra Alta, Tarragona Image of Caseres, not of the place itself. Castle located in the municipality of Caseres, in the Terra Alta, declared a cultural asset of national interest. It is believed to have been a medieval manor house, possibly a fortified house linked to the Hospitaller commandery of Horta de Sant Joan. Its probable location is known, without much precision, near the village church, where remains might be preserved underground, although it is unknown whether it ever had any properly fortified feature. Photo: Viquipèdia / Wikimedia Commons (CC BY-SA) What to see and do in Caseres