The most intense weathering of the conglomerate rocks has been taking place along the weakened lines in the rock. These places are most often crevices caused by tectonic forces (e.g. during orogeny). They often follow the original direction of layers, what is sometimes also visible in the terrain. The crevices are exposed to external factors such as rainfall, changes in temperature, activities of organisms - this creates holes of various shapes and sizes. Gates and caves attract the most attention. The Gothic Gate measures 13 meters and it is the highest gate in the Sulov Rocks. It is the most famous rock gate in the Sulov Rocks thanks to its characteristic shape, which resembles gothic vault.
The touristic sign in Rohac massif (northeastern part of NNR) leads to gate called Great Gate and also to fissure cave called The Dragon’s Hole. The cave is known for the findings of the bones of a cave bear, and shards of Neolithic pottery.