The 794 foot elevation of this hill overlooking Cartagena and its harbor has made it an ideal location for sentries since the Middle Ages. In Spanish, the name of the mount and fortress is Atalaya meaning watchtower. Fuerte de la Atalaya was built in 1777 during the massive fortification of Cartagena ordered by Spanish King Carlos III. The citadel is shaped as an isosceles trapezoid. The design includes six bastions. You can visit Atalaya Castle. However, reaching it can be challenging and much of the structure is in poor condition.