Torre Alfonsina, built in the 13th century within the Castillo de Lorca in Murcia under the mandate of King Alfonso X el Sabio, stands 30 meters tall as a monument to royal power. Named in the monarch's honor, this distinctive stone tower was designed to be visible from all points across the valley and regional border, symbolizing Castilian authority along the contested frontier with the Kingdom of Granada. For over 250 years, it served as the Kingdom of Castile's eastern boundary marker. The tower was rebuilt in the 15th century to increase its thickness and height, featuring three bodies with pointed vaults and four Mudéjar-style windows. Recent rehabilitation efforts, funded through European Next GenerationEU programs with an investment exceeding 600,000 euros, are enhancing accessibility and preservation of this iconic medieval structure.