A deer-decorated stones in Uushigiin uver of Khuvsgul province considered as most clearly depicted deer stones in Mongolia. These deer stones were aligned from north to south in a single column. Each stone is 3-20m distant from each other and made of tetrahedral granite stone in reddish color. A deer, an arch, a shield, a horse, a knife, the moon, the sun and a mirror figured belt were engraved on the stones. 

There are around 900 hundred of these deer stones in the world, and 700 hundred of them found in Mongolia. Deer stones are ancient megaliths carved with symbols found largely in Siberia and Mongolia.The name comes from their carved depictions of flying deer. There are many theories to the reasons behind their existence and the people who made them.
Deer stones are usually constructed from granite or greenstone, depending on which is the most abundant in the surrounding area. They have varying heights; most are over 3 feet tall, but some reach a height of 15 feet. The tops of the stones can be flat, round or smashed, suggesting that perhaps the original top had been deliberately destroyed. The stones are usually oriented with the decorated face to the east.
The carvings and designs were most usually completed before the stone was erected, though some stones show signs of being carved in place.[  The designs were pecked or ground into the stone surface. Deep-grooved cuts and right-angle surfaces indicate the presence of metal tools. Stone tools were used to smooth the harsh cuts of some designs. Nearly all the stones were hand carved, but some unusual stones show signs that they could have been cut with a primitive type of mechanical drill. 
Reindeer feature prominently in nearly all of the deer stones. Early stones have very simple images of reindeer, and as time progresses, the designs increase in detail. A gap of 500 years results in the appearance of the complicated flying reindeer depiction. Reindeer are depicted as flying through the air, rather than merely running on land. The antlers, sometimes appearing in pairs, have become extremely ornate, utilizing vast spiral designs that can encompass the entire deer. These antlers sometimes hold a sun disc or other sun-related image. Other artwork from the same period further emphasizes the connection between the reindeer and the sun, which is a very common association in Siberian shamanism. Tattoos on buried warriors contain deer tattoos, featuring antlers embellished with small birds' heads. This reindeer-sun-bird imagery perhaps symbolizes the shaman's spiritual transformation from the earth to the sky: the passage from earthly life to heavenly life. As these deer images also appear in warrior tattoos, it is possible that reindeer were believed to offer protection from dangerous forces. Another theory is that the deer spirit served as a guide to assist the warrior soul to heaven.