The paper is aimed at the evidence of old quarries and other open mining sites in former Czechoslovakia. It is the result of several years of research. In the manuscript is described a very interesting history of the mapping in our country and especially the digital database and the web map building process. We register 10 000 historical mining sites that were active in the first half of the 20th century. The web map is designated for geologist, historians, landscape ecologists, biologists, etc.