A small stream rushing down the Pepř Hill toward the Sázava River flows through a valley that has been called Kocourkovské since the oldest times. The stony and in places artificially streamlined rivulet creates visible cascades and steps, mainly in the places with resistant deposits of eruptive rock – green and black gabbro. This rock is popular for tiling, monuments and other special stonework. A gold-bearing vein system – the renowned Kocourkovské Range – cuts through the valley, which is literary peppered with the remains of the gold mining works. There are numerous spoil heaps and old buried mine tunnels and drifts. Scores of springs and wells are also worthy of attention on a stroll through the valley. In many cases they are parts of the old mines’ water drainage systems. The St. Joseph Stole is well-known; it is currently open to the public. It was first charted on an old mining map dating from 1728. Slanted tunnels that follow the gold-bearing veins are typical for this tunnel. The shape of the corridors changes as they narrow down or widen up to follow the old gold veins’ paths. The neighbouring St. Anthony of Padua Stole is unique thanks to the remains of medieval mining from the 17th and the 18th centuries. Using traditional mining lamps, visitors today can climb up and down the ladders as if in the former miners’ boots and experience their difficulty of movement and working conditions. The original timbering was replaced by a new system built into the original holes hewn into the rocks. The walls of the stole bear traces of the old hand mining. The old viaduct at the bottom part of the valley is a unique technical monument. It is only one meter lower than the well-known Nuselský Bridge that spans the Nuselské Valley in Prague. It was built practically without any mechanization in 1899 thanks to the endeavours of the citizens of Jílové who wished to have the railway handy. Two tunnels had to be hewn into the rocks to enable the building of the railway track along the rocky hill slopes 50-70 metres above the Sázava River. The rare species of fire salamander lives in the Kocourské Valley. They leave their hiding places after heavy rains in the springtime.