Looking for the walk/run with the most unusual course in the world? You'll discover it at Discovery Park of America in Union City, Tennessee. The route meanders through a 50-acre heritage park that features a man-made river flowing through the extensively-landscaped property, along with waterfalls, bridges and other water features. No place else can you dash by a 120-year-old church, an 1800s frontier settlement, a reproduction of a town from the early 19th Century and a complete vintage train station. Stick around after the event and explore the 100,000-square-foot museum. Sponsored by CrossFit AutoBody