several exting quaternary volcanoes are situated in the surroundings of the town brunt l most of them belong to the group of mixed volcanoes which means that the activity of the volcanoes was in turns explosive and extrusive lava was vomited during the surface in the shape of incoherent volvano eruptive rock on the contrary by the extrusion lava was running out from the crater and formed the lava streams the volcano eruptive rocks form mostly the volcano maar velk roudn big roudn m above sea and mal roudn small roudn m above sea velk roudn big roudn is the highest volcano of the low jesen ky mountains this volcano was last active milion years ago big a small roudn form two remarkable peaks above the village roudno from three lava streams of big roudn the northeaster one is the longest and the quarry for whinstone mining was made here this lava stream dammed up the valley of the river moravice in the place of todays slezska harta so a great lake was formed to which the eruptive rocks were falling they created sediments of sponge puff stones which are today found in the surroundings of the villages razov and karlovec these puff stones were mined as a good building material tabthe brunt l volcanoes create a remarkable and striking feature of the low jeseniky mountains countryside trip to big roudn tabthe easier way to big roudn is from the going to k i tanovice we will go along the guidepost from the upper crossing in roudno we are on the top in half an hour where a big information board is placed and next to it there is a cone hollow which is considered to be the rest of the crater a rebuilt small chapel is placed on the top behind the chapel there are pictures of the station of the cross on the stands if we go downhill we come to two stony mounds with a cross to the victims of the st word war in more ambitous tourists can go down from the mound maybe m downhill to a visible road which goes out from the forest and go on along a meadow path at first to the southern direction and then turn down the way to the road to b l ice