El Real Castle and Olla Tower of Marines Monument · Marines, El Camp de Túria, Valencia Between Marines and Marines Viejo stands the Castillo El Real, an 11th-century fortress with a tower, walls and Arab wells, while the Torre de Olla, listed as a heritage asset in 2002, rises on the old Olla road. Photo: Inthenameofbohr (CC BY-SA 4.0) What to see and do in Marines