There are 22 mineral springs in Hissar - 16 natural and 6 deeply drilled with temperatures ranging from 37 to 51 degrees C. Their water has a low mineral level - 0.257 g/l, hydrogen carbonate-sulfate, chlorine and sodium, fluorine-silicic, alkaline. It has a high pH level - 9. It has not got colour or smell. It is with pleasant taste. Hissar mineral water can be used both as table water and for prevention of: gastro-intestinal tract diseases; nephrolithiasis and nephro-urological diseases; cholelithiasis; locomotory system diseases; gynecological diseases; dental diseases and prevention of dental caries; chronic intoxication with heavy metals and pharmaceutical substances.

Undoubtedly the most beautiful thing in Hissar are the parks which invite visitors to enjoy the variety of ornamental trees and plants. Acacia, lime, lilac, pine, Canadian oak, silver spruce, magnolia, the exotic ginco biloba, paulovnia, albicia and acer. In Hissar there are four kinds of lime trees with different blossom periods which ensure an aroma lasting over 30 days. The beginnings were laid by Swiss engineer Luis Chevalas who created the first park near the present Toplitza baths. It was much later that the parks near the Momina Banya spring, the Open-air Theatre and the luxurious Residence park were modeled. All the sanatoriums, hotels and holiday cottages are surrounded by enormous parks, too. About 100 hectares of greenery with over 300 plant species, some of them listed in the Bulgarian Red Book of endangered species.

Right after leaving the town tourists find themselves in the fields – the shining gold of wheat contrasts with the green of beech and acacia woods, and they, in turn, with the meadows covered in dandelion and clover. Extravagant in colour, a feast for the eye. Sheep and goats are grazing in the glades, hares are chasing in the undergrowth. In the shady gullies twinkle small lakes the colour of nephrite, creating indescribable freshness in the summer heat. At times you can hear the shrill cry of a falcon.