They clean up rivers, build homes for disabled veterans and bring health care to some of the darkest parts of the world.
They help children who are fighting cancer, poverty and a lack of opportunity.
These are the top 10 CNN Heroes of 2013.
http://www.cnn.com/2013/11/01/us/top-10-cnn-heroes/index.html?hpt=wo_bn3
Motor Sports Across the World 