Dedicate the sixth day of your trip to exploring the city of Guilin. Start your day by visiting the iconic Elephant Trunk Hill, one of Guilin's most famous landmarks. Explore the hill's caves and pavilions, and climb to the top for a panoramic view of the city and the Li River. Next, head to the Seven Star Park, a vast scenic area known for its beautiful landscapes, caves, and cultural relics. Visit the Seven Star Cave, home to stunning stalactites and stalagmites, and stroll through the park's gardens and bamboo groves. In the evening, take a relaxing walk along the scenic lakeside promenade of Shanhu Lake.