颐和园, or the Summer Palace, is a vast imperial garden located in Beijing, China. It was originally built in the 18th century during the Qing Dynasty and served as a royal retreat. The garden features beautiful landscapes, including Kunming Lake and Longevity Hill, along with numerous pavilions, bridges, and temples. The Summer Palace is renowned for its classical Chinese architecture and natural beauty, making it a UNESCO World Heritage Site. Visitors can explore the Long Corridor, which is adorned with thousands of paintings, and enjoy boat rides on the lake, experiencing the tranquility of this historic site.