Olympic Park Observation Tower, Beijing, China designed by Shi Yingfang, Li Lei and Wen Yaling, height 243m. Construction began in 2008, to coincide with that year's Summer Olympics and completed/opened in 2014. It is used strictly for observation; there is no provision for offices or apartments. 258 metres (846 ft) in height, its design, with 4 smaller circular floors at different heights and positions below a larger top floor, is meant to echo the Olympic rings.
Olympic Stadium in Beijing, China, also known as the Bird's Nest. Easily the most memorable part of the 2008 Olympics. Inspired by traditional Chinese ceramics as well as contemporary abstracts in the East. The only thing better than visiting this would be playing in it.