Madagascar, officially the Republic of Madagascar, is a vast island nation located off the southeastern coast of Africa. It is the world's fourth largest island and the second-largest island country, giving it a unique geographical position in the Indian Ocean. The country's diverse ecosystems, ranging from tropical rainforests to arid spiny forests, support unparalleled biodiversity. The population is estimated to be around 27.7 million people, with the capital and largest city being Antananarivo. Historically, Madagascar has been a crossroads of cultures, attracting influences from Africa, Asia, and the Middle East.