Domogled-Cerna Valley National Park is a protected natural area that combines natural elements of rare and spectacular beauty with tumultuous historical events whose echoes are found on the old patrol border.

“Patraula” (the patrol) was settled by the Austrian border guards in the days of the rule of the Austro-Hungarian Empire. An inscription mentions that it opened in 1839. Cerna River, which crosses Domogled-Cerna Valley National Park on a distance of about 80 km, represented the border between the Austro-Hungarian Empire and Romanian Country.

The Austrian border guards dug in the limestone rock to achieve this portion of the patrol which is also called “Piatra puşcată” (Blasted stone). On the right bank of Cerna River, near “Piatra puşcată” (Blasted stone), there are two thermal springs.