On December 21, 2025, Beijing’s historic Summer Palace witnessed a breathtaking astronomical phenomenon as the winter solstice sunset aligned perfectly with the iconic 17-Arch Bridge. The precisely calculated positioning of the sun created a stunning visual effect where the golden rays illuminated all seventeen arches simultaneously, casting a warm, ethereal glow across the ancient structure.
This annual celestial event attracted hundreds of visitors and photography enthusiasts who gathered along the banks of Kunming Lake to witness and capture the spectacular sight. The bridge, originally constructed during the Qing Dynasty between 1736 and 1795, serves not only as a functional passage but also as a masterpiece of Chinese architectural engineering.
The phenomenon occurs due to the specific alignment of the bridge’s design with the sun’s position during the winter solstice, the shortest day of the year in the Northern Hemisphere. This architectural-astronomical harmony demonstrates the sophisticated understanding of celestial patterns possessed by ancient Chinese builders, who intentionally designed the structure to create this dramatic annual occurrence.
Photographers patiently waited for the optimal moment when the sinking sun positioned itself directly behind the bridge, transforming the structure into a silhouetted masterpiece against the fiery sunset. The resulting images showcase how traditional Chinese architecture harmonizes with natural phenomena, creating a temporary artistic installation enhanced by nature’s own illumination.
The event has grown increasingly popular in recent years, drawing both domestic tourists and international visitors interested in experiencing this unique combination of cultural heritage and astronomical wonder. Park authorities maintained orderly viewing conditions while preserving the tranquil atmosphere of the UNESCO World Heritage Site.