Boulder City has grown up around Hemenway Valley Park, which was once a little bit removed from houses and people. The park itself is pretty ordinary, with well-used picnic areas, a tennis court and a playground. The exceptional thing about the park is the herd of Big Horn Sheep that hangs out there. The herd is good-sized, and the sheep ignore the people who stop to stare at them. You'll definitely want to take pictures. This is probably the closest you'll come to a Big Horn, who typically live in remote areas. Remember that while these sheep may seem tranquil, they are wild animals. Respect them and keep a safe distance away.