Participants attend the annual May bank holiday “Jack In The Green” parade and festival in Hastings, Britain, May 6, 2019. (Photo by Toby Melville/Reuters)
Participants compete during the Strong Race event near Tukums, Latvia, May 3, 2015. More than 4,000 people participated in this 9 km endurance race with 33 different obstacles. (Photo by Ints Kalnins/Reuters)