koneprusy caves, czech republic, summer

arch area autumnal beroun big blue bohemia bohemian calcite cave caves cliff clouds country countryside czech day dig digger ecology environment erosion europe exteriors extracting extraction forest geology greenery heavy herbage hill hills holiday industrial industry karst koneprusy landforms landscape landscapes large lime limestone mine mineral mount natural nature nobody open outdoors pit plants production protected quarry republic reservations resource rock rocky rural scenes sky spot stalactite stone summer sunny tourism trees valley vegetation white wood woods