observation deck with panoramic view of blue lake Þingvallavatn, largest natural lake of iceland, in Þingvellir national park.

þingvallavatn lake iceland þingvellir thingvellir thingvallavatn winter snow observation deck blue clouds forest horizon icelandic iron landscape metal mountain mountain range mountains national park natural nature people observation deck observation platform panorama panoramic platform railing rough rugged sky snow-covered snowy stunning sunlight sunny tourism travel trees view viewing viewing deck volcanic water þingvellir national park