This annual race event, now in its 38th year, has developed into a world-class stage responsible for launching new race technology as well as the careers of some of the world’s fastest runners today. Shoe chips were introduced for the first time here, as well as the real-time transmission of results to cell phones. Because the course winds past some of the most iconic sights in Vienna, with a climactic finish line in the historic Heldenplatz, the race attracts more than a quarter of a million enthusiastic (and sometimes, quite entertaining) spectators every year. Sunday September 12, from 09:00. For more information see www.vienna-marathon.com.