Galle is located in the southwest of Sri Lanka, about 100 kilometers south of the capital Colombo, on the coast of the Indian Ocean. The old city of Galle and its castle are built on the Rock Peninsula, a natural harbor. The entrance to the harbor has become extremely complex due to the emergence of a large number of coral reefs. The existence of the old city of Galle fully demonstrates the interaction between European architecture and traditional architecture in South Asia during the 17th and 19th centuries. Local architects have changed the original European architectural models, making them well adapted to Sri Lanka's geographical, climatic, historical and cultural conditions. I deeply felt the sense of literary and artistic routes here. I stayed at a hotel in Galle Fortry, built more than 400 years ago when the Dutch colonized. After enjoying breakfast leisurely, I began to tour the whole fortress, walking on the walls, looking at the fortresses, bell towers and lighthouses everywhere, walking in alleys full of shops, and the secret attractions of tour guides: standing on the wall somewhere, watching turtles constantly come out of the water to breathe, it was very interesting.