landscape of thingvellir rift valley of the mid atlantic ridge and lake thingvallavatn in iceland

althing alafrac34 ing canyon cliff cloudy environment europe geological geology golden circle iceland green hill historical landscape icelandic lake afrac34 ingvallavatn mid atlantic ridge mountain mountains nature outdoor parliament plains pingvellir rift rock scenery scenic sky south summer tectonic plates map thingvallavatn thingvellir national park valley tourism travel volcanic ingvellir