The World Trade Center Seoul, located in Gangnam District, hosts various expositions and conferences. Also in Gangnam District is the COEX Mall, a large indoor shopping and entertainment complex. Downstream from Gangnam District is Yeouido, an island that is home to the National Assembly, major broadcasting studios, and a number of large office buildings, as well as the Korea Finance Building and the Yoido Full Gospel Church. The Olympic Stadium, Olympic Park, and Lotte World are located in Songpa District, on the south side of the Han River, upstream from Gangnam District. Three new modern landmarks of Seoul are Dongdaemun Design Plaza & Park, designed by Zaha Hadid, the new wave-shaped Seoul City Hall, by Yoo Kerl of iArc, and the Lotte World Tower, the 5th tallest building in the world designed by Kohn Pederson Fox.