nature reserve soos

activity birch blow blue boggy bohemia brook bubble carbon co2 conservation czech dead diatomaceous dioxide earth environment environmental europe fen flora forest fountain franzensbad fumarole gas gases geyser grass hole iron kieselguhr landscape leading methane mineral mofette moor moorlands mud muddy natural nature old oxidation peat pond protection rail railway reed republic reserve root seismic sink sky soos source sulfur swamp swampy toxic tree volcanic volcanism volcano water web white