Sian Ka’an is a biosphere reserve in the town of 图伦, 金塔纳罗奥, 墨西哥. It became a 联合国教科文组织 世界遗产 in 1987. Part of the reserve is on land and part is in the Caribbean Sea, including a section of coral reef. The reserve offers protection for the endangered species in the Riviera Maya and provides environmental education to the local communities to assist and train the residents working with ecotourism.
Isla Espiritu Santo is an island in the Gulf of California protected under 联合国教科文组织 as a bio-sphere. It is located in 南下加利福尼亚州, 墨西哥. It is connected to Isla Partida by a slender isthmus. Both islands are uninhabited. They both are a part of the municipality of 拉巴斯, which is just a short boat ride away.