Sredne is famous for the remains of a 13th-century Templar castle. Serednyansky castle is considered the easternmost Outpost of this powerful medieval order and almost the only castle of the silver land in the Romanesque style. The Templars, who were not only soldiers and monks, but also enterprising businessmen, were brought to Transcarpathia by the white gold of the middle ages-salt, which is very rich in these lands. In addition to business, the Templars were engaged in providing medical care to the local population. They even knew how to perform surgical operations.
The area is rich in mineral waters of the carbon-chlorocalcium type: 53 explored sources. The most famous of them – Simovski, Buckovski, Kolachevskii, Verkhniobystrynske, Kelechynske. The latter's water is used for the treatment of radiation sickness
