Every year, America's national park system gets more than 300 million visits. These popular natural attractions are not dangerous on the whole, but there are, on average, 160 deaths inside U.S. parks each year. Most of these fatalities are due to drowning, car accidents or falls. Perhaps surprisingly, deaths from things like grizzly bear attacks or snake bites are extremely rare.
Some of the most dangerous sections of national parks are quite remote, so most people never set foot there. Other spots where deaths have occurred are surprisingly accessible. Many people have likely set foot in these places without being aware of the relative danger. The National Park Service is aware of the dangers, however. They regularly post or broadcast warnings about safe usage of these places and the presence of unsafe conditions, like in instances of flooding in the Narrows of Zion National Park (pictured).
Here are 10 of the most dangerous spots in national parks.