Mongol Olle Trail will attract not only tourists from Korea but also many walking travelers abroad in result of increasing the number of visitors to Mongolia and revitalizing the regional economy. Also, it is expected that Mongol Olle Trail serves as a milestone to develop the tourism in Mongolia and another symbolic project in cooperation between Korea and Mongolia. The two trails - both in the vicinity of Ulaanbaatar - are 14.5 and 11 kilometers respectively. The longer 14.5 km trail takes walkers through a traditional yurt tent village near the city before returning through a forest path to give walkers a taste of both Mongolian culture and nature. The shorter 11 km trail includes an overnight stay in a yurt tent in Terelj National Park, a UNESCO World Heritage site. Visitors will be able to see firsthand Mongolian herding culture with yaks and horses. The best season you can enjoy Mongol Olle is the month between June-September. An "olle" was originally a Jeju word for the narrow path leading from a house to the street. Since 2006, it has taken on another meaning altogether. There are now 21 trails covering 422 kilometers on the island. Currently, there are three sister trails and six friendship trails in Canada, Australia, England, Switzerland, Mongolia, and Lebanon.