blue lake natural coloring at jenolan caves in blue mountains, australia

aquamarine architecture attraction australia australian background basin blue cave caves color coloring colour colouring countryside cyan dam destination environment forest heritage hiking jenolan lake landscape landscaping magical mineral minerals mountains national natural nature nsw palm park path peaceful place quiet reserve river romantic secluded silence solitary south sydney system teal tourism tourist touristic track trail tranquil travel trees turquoise turquoisegreen valley viridian wales water waters recreational area side effect picks passing caves