hot geothermal blue mud pool at reykjadalur valley with lush green grass meadowa nd steam. south iceland near hveragerdi

activity background blue color environment europe fumarola fumaroles geology geothermal grass green hike hiking hot hveragerdi hverageri iceland icelandic landscape mountains mud natural nature outdoor park pool relaxation reykjadalur river sky spring steam stream summer therma thermal tourism tourist trail travel trekking valley vivid volcanic water