Built on the Olympic Green, Beijing National Stadium, or the Bird’s Nest Stadium, as it has become known, is the biggest stadium in Beijing and an important Olympic venue. The outer shell is the world's largest steel structure, forming part of the most complex Olympic stadium ever constructed. Some would even go as far as to say it is one of the key engineering marvels in the world today. The 2022 The 2022 Winter Olympics are around the corner. The Beijing National Stadium will witness the start of the 2022 Winter Olympics, as it is the opening and closing ceremonies venue, and will become the only stadium in the world to host both summer and winter Olympic Games ceremonies.