Western Mongolia is a region in Mongolia covering the provinces (or Aimags) of Bayan-Ölgii, Hovd, Uvs, and Zavkhan. It is the most remote region of the country. It is also the most ethnically diverse, mountainous, and scenic region of Mongolia, with thousands of years of history. The region is home to the Kazakhs, a Muslim tribe from near the Caspian Sea, and Oirats, or western Mongols, which can be divided into 10 different tribes, as well as Khalkhs, or eastern Mongols. In addition to the ethnic diversity, the region is home to the Altai Mountain Range, with the highest peaks in Mongolia, Lake Uvs, a large saltwater lake, and many smaller lakes, mountains, rivers, forests, and steppe. Spread throughout the region are countless archeological sites with petroglyphs, cave paintings, standing stone monuments, monasteries, and ancient forts that date back as far as 10,000 years.