viti geothermal warm turquoise crater lake and oskjuvatn lake in askja caldera

askja background beautiful blue breathtaking caldera color crater destination dreki europe famous geothermal highland hot iceland icelandic lagoon lake landmark landscape mountain myvatn natural nature nobody nordic north northern oskjuvatn outdoor panoramic popular reykjahlid scandinavian scenery scenic sky snow sulfur summer travel turquoise view viti volcanic volcano wanderlust warm water