Helsinki, Finland. Olympic Park, Helsingin Olympiastadion . It was completed in 1938 and hosted the 1940 Summer Olympics, 1952 Summer Olympics, 1983 World Athletics Championships, 2005 World Athletics Championships. It is worth mentioning two magnificent buildings, one white tower in honor of Marty Yellvinin's javelin winner at the 1932 Olympics, and a bronze statue of Finnish runner Pavo Rumi.