Recommend the San Felipe Castle. There are great views here, and when you like the history of Cartagena, India, this is a good place to learn something. There are qualified guides and auditors in the castle. In summer, it is recommended to wear a hat because there is no shadow on the castle. For everyone who wants to visit, I wish you have fun!
Those stone caves washed out by water are called stone pots. When the water rushes over the surface of the big stone, it forms a whirlpool, turning around with some small stones on the surface. As time passes, the big stones are ground into deep pits. The landform of stone pot is hard to form