A Japanese Macaque monkey relaxes in the hot spring at the Jigokudani (Hell's Valley) Monkey Park on February 17, 2008 in Jigokudani, Nagano, Japan. This Macaque troop regularly visits the Jigokudani-Onsen springs to escape the cold, behaviour originating from a female Macaque which ventured into the hot springs to retrieve soybeans in 1963. By Koichi Kamoshida/Getty Images.