Chile is a long, narrow country that spans a wide range of climates and terrain from deserts to tropical regions. It has a high level of biodiversity with many endemic plant and animal species. Indigenous peoples make up a small percentage of the population, with Mapuche being the largest group. Chile experienced waves of immigration over its history, and most citizens today identify as Christian and speak a unique variant of Spanish. The country was colonized by Spain in the 16th century and gained independence in the early 19th century. Chile has experienced both political instability and natural disasters in the modern era.