The alley is made of two rows of 762 plane trees planted in 1892 and dozens of horse chestnut trees as surely the most beautiful tree row in Bosnia and Herzegovina.

The spring of the Bosna River is an outstanding park with numerous streams forming lakes and islands in this geological, hydrological and botanical-horticultural phenomenon. The most beautiful one, however, is the source of the Bosna River, which springs from a number of karst springs at an altitude of 492 meters. The water is of exceptional quality; therefore, a pump station of the city water supply was built next to the spring. The nature here still exceeds the strength and beauty of anything else seen, making the spring of the Bosna River one of the most precious natural and tourist pearls of Bosnia and Herzegovina.