Castillo de Despeñaperros, also known as San José Castle, is a historic fortress located in Cartagena, Murcia, Spain. Built in the 11th century, this castle was strategically constructed to protect key locations such as the San José Gates and the Naval Hospital. It was declared a cultural site in 1997, highlighting its significance in the region's history. The castle features robust masonry walls and a unique structure that reflects its military purpose, although it has not been used for this function since the early 20th century.

Visitors to Despeñaperros Castle can appreciate its impressive exterior, which stands as a testament to its historical importance. The castle is characterized by its solid, bastioned design, with a lower section that once housed the garrison and a water reservoir, and an upper section where cannons were positioned. While access to the interior is limited, the views from the surrounding area provide a glimpse into the castle's past and its role in the defense of Cartagena. The site is often appreciated for its historical ambiance and the opportunity to reflect on the military architecture of the time.

The castle is open for visitors to explore the grounds, but specific opening hours may vary, so it's advisable to check ahead before your visit. There is no entrance fee, making it an accessible stop for anyone interested in history. To get there, you can take a short walk from the city center, as it is located just a few kilometers away. For the best experience, consider visiting in the early morning or late afternoon when the light is perfect for photography.