Extreme sport always has a high level of inherent danger. These activities often involve speed, height, a high level of physical exertion, and highly specialized gear or spectacular stunts. National Geographic highlights the top photos about extreme sport in its ongoing gallery called Extreme Photos of the Week. Here are some of the best from this week.
Extreme sport always has a high level of inherent danger. These activities often involve speed, height, a high level of physical exertion, and highly specialized gear or spectacular stunts. National Geographic highlights the top photos about extreme sport in its ongoing gallery called Extreme Photos of the Week. Here are some of the best from this week. 
