GEOPARK – The St. John's Mine – an underground tour of a 350-m long tin mine drift from 500 years ago. A seasonal facility. A place where you can really touch the past is the underground tour of ‘the St. John's Mine’ in Krobica, in the municipality of Mirsk. Fans of geology and history have restored 350 meters of a tin mine drift from 500 years ago. You leave the picturesque scenery of the Jizera Mountains, enter a mountain and, led by a guide, you explore 5 centuries of tin and cobalt ore mining. You can see the hard work of the miners, who erected stamps and dug drifts by themselves. Fotografie Wiesław Biernat Fotoplus