Black lake below Bischofstein

The Černé lake can be found a few steps behind the grounds of the Skály boarding house (formerly the castle). This is a small water reservoir, which was created here by artificial retention of water under the rock walls. The name "Black Lake" was derived from the dark color of the water. This is caused by substances released from peat, mosses and a thick layer of plant residues in the mud at the bottom. A decisive role in this natural process is played by humic acids, which…