thingvellir, steep valley formed by the separation of two tectonic plates, with rocky cliffs and fissures. selfoss

bingvellir blue canyon circle cliffs continental divide earthquake environment europe famous fissures formed geological geology golden iceland icelandic landmark landscape lava national natural nature outdoor outdoors oxararfoss park pingvellir place plate plates river rock rocky scenics seismic selfoss separating separation sky steep stone summer tectonic thingvellir tourism travel two valley volcanic waterfall