Stone from the quarry located east of the village of Teletín was formerly used for the construction of the Slapy Dam. The hands of stonemasons uncovered a rocky wall in the slope of the forested hill. With a small pond at the bottom, it is now a rather charming spot. The oldest, lowest part of the quarry is made of a dark rock, the so-called melagabbra, created more than 400 million years ago. The lighter granite with blocks of dark silica diorite is much younger. Blocks of rocks were intersected with veins of silica, aplite and pegmatite during the following mountain building orogenic processes. Such a combination of minerals created colourful patterns which are visible on the rock walls of the now deserted quarry. After the stonemasons left the area, nature took over. Birch grow on the rock debris and pine tree have their roots ingrown into rock fissures and twisted among the stones. The pond at the bottom of the quarry is inhabited by amphibians, namely the brown frog and the smooth newt. The viper, the only poisonous Czech snake, has found its way here too. The typical zigzag stripe on its back is impossible to miss and, fortunately, this snake is very timid and always prefers running away to attacking. The viper is a critically endangered strictly protected species in the Czech Republic. The Teletínský Quarry is a protected nature monument for the occurrence of a unique geological phenomenon.