Along with a business partner, DiCaprio purchased the 104-acre Blackadore Caye for $1.75 million about 10 years ago and plans to open "Blackadore Caye, a Restorative Island" in 2018.
In recent years, the island has suffered from overfishing and coastal erosion, and its population of native palm trees and other indigenous plants has been seriously diminished.
Among the features DiCaprio hopes to include are 68 guest villas, a manatee conservation area, and an ecology orientation program for all guests. The resort will be self-sufficient in terms of energy and water.
"The main focus is to do something that will change the world," DiCaprio told the Times.
Read more about DiCaprio's venture here.