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

thingvallavatn winter iceland þingvellir thingvellir þingvallavatn lake trees mountains snow bare beautiful blue clouds cold color colored coniferous famous forest green icelandic landscape mountain mountain range national park natural nature people panorama panoramic rock rough rugged shore sky snow-covered snowy stunning sunlight sunny tourism travel vacation view volcanic water þingvellir national park