In the Middle Miocene (Badenian) age, about 20-22 million years ago – in addition to volcanic activity that formed the Carpathian Mountains – in the area of present Transylvania formed a shallow sea, isolated from the Tethys Ocean in Central Europe. This sea gradually dried, resulting in the precipitation of salt, and salt layers were deposited, while the area of the Transylvanian Depression sank. Today, the average thickness of the layer of salt in Transylvania is 250 m. Later, due to erosion salt blocks outcroped, for exapmle at Ținutul Sării (Salt Land). As a consequence the salt rocks at Praid became visible, called Muntele Sărat (Salt Mountain). Special halophilic plants live here, such as jointed glasswort (Salicornia herbacea), sea aster (Aster tripolium), salt sandspurry (Spergularia salina), opposite-leaved saltwort (Salsola soda), Artemisia santonicum, sea plantain (Plantago maritima), or statice (Statice gmelini). Salt rocks can be visited during the thematic route “Salt Road”. It is worth to spend some time in the area and to observe the different formations of salt, as salt-furrows, salt-towers, salt-cauliflowers and salt crystals.
Access: From the salt mine from Praid towards Banya street, we pass the salt bath and reach the thematic route called Salt Road. Within the thematic route we can visit the salt rocks for an entry fee. The trail is only 1.5 km long. If we come from Odorheiu Secuiesc (Székelyudvarhely in Hungarian) at Ocna de Sus (Felsősófalva in Hungarian) we go towards Ocna de Jos (Alsósófalva in Hungarian). Driving on road no. 49 we reach the Salt Road entrance.