If you're interested in helping big cats like lions and leopards, one way you can help is to fund the building of "bomas" in African villages. A boma is a fenced-in area that protects and maintains livestock. It's a barrier between the big cats and cattle, and it discourages locals from retaliating against lions who kill cattle. For $500 -- and $25 a year to maintain -- you can increase the safety of big cats. Learn more at buildaboma.org.