Heavy rains have carved in the geological area of Mierag Valley, (valley which actually consists of a main valley of 1.5 km long and a 0.5 km secondary valley) a geomorphologic phenomenon with special landscape effects and special tourist interest. The erosion has given rise to almost bizarre formations. Their strangeness lies in the possible similarities with giant forms laid here by giant, mythical ancestors of these places.
Mierag Cliffs is an interesting phenomenon located in Codru Moma Hills (Codru-Moma Mountains) in Beiusului Depression. These ravine names come from the village of Mierag, as they are located upstream the village. The ravines are formed out of deposits (sensu stricto pannonian) composed of silty clays and clay marl alternating with sand and gravel. The ravines are the starting point of the Mierag stream that has an intermittent water course; the valley is dry and only during rainy periods a stormy river forms, that carries large amounts of silt, negatively affecting the downstream village. For this reason concrete dams were built on the main course, seven on the main stream and three on its tributaries. The valley bedrock is lined with yellow sand and gravel. The valley is bordered by Cornetului Hill and Hinchirisului Hill from west to east. Deprived of water, the valley bedrock is covered with grasses, bushes and the slopes of the valley are phage wooded. In some places acacia (baglini by the local name) are planted especially in the upper valley. The difference valley-ridge is over 20-30 m. The valley presents secondary streams as active as the main course. The ravines consist of two valleys, the main one 1.5 km long and the secondary one 0.5km, the two courses meet upstream the village Mierag. At the upstream end of the two valleys two torrential basins exist, one on each valley and each basin there has one earth tower as witnesses of the erosion. The first tower, on the main valley, is about 30 meters high and about as many meters wide, with grasses and shrubs which protect it from erosion. Downstream the tower there are small pyramids of earth, without protective vegetation so that they will eventually be eroded (these small pyramids are called up cuca). The tower on the secondary valley is lower, about 15 m and has the same grasses and erosion protection.