In 1956, businessman and conservationist Laurance Rockefeller saw the beauty of Saint John, one of the US Virgin Islands in the Caribbean, and knew it had to be preserved. Covering about 60% of the island and 22.86 square kilometres of submerged lands, this park is a living example of preservation—thanks to Rockefeller, who donated over 20.23 square kilometres of his land to the US government.