Chiang Mai is not only open for tourists to study. If it is a shady park with a group of trees suitable for recreation. Huay Kaew Arboretum was established in 1913 to be a trial of wood. Later in World War II, the Japanese army came to the area. And cut the wood to use. After World War 2, the Royal Forest Department at that time planted various types of substitutes and established a botanical garden. But with space constraints that are too small. It was changed to the arboretum instead in 1953. However, according to a survey in 2010 found within the Arboretum. There are more than 250 kinds of plants, 55 families and 159 families. The most common family is LEGUMINOSAE. There are 24 genera, 40 species. The most abundant species are the salamander of 165 plants. The most prominent feature in the area is rubber. The first floor canopy is distributed throughout the area. The size of the height of 30-40 meters, the width of the trunk with a 1.5-2.5 meters in circumference. There are also 8 species of natural garden for the study of nature. Park of Buddhist History Park in the Literature Chalerm Phrakiat Botanical Garden The park offers a variety of benefits. The sacred tree. Myrtle Grove And herbal garden.