Torre del Cubo in Siles, Jaén province, is a 27-meter cylindrical tower dating to 1397, representing all that remains of a medieval fortress within the city walls. Built possibly over Almohad-era foundations, this two-story structure features a barrel-vaulted lower chamber and a pointed vault above, serving as part of the southern defensive enclosure called the alcazarejo. Located near the Church of the Assumption, the tower anchored Siles' fortifications and remains a key landmark on the Andalusian Castle Route, recognized as a Cultural Heritage site for its well-preserved medieval architecture.
