Parallel crevasses and glacial blue lake revealed on top-down drone aerial slowly flying over a glacier in Iceland

parrallel crevasse glacier pristine nature glacial lake iceland europe arctic topdown view winter drone flight frozen polar ice wilderness cold climate ice cap untouched nordic ice field blue ice patterns mountains alpine grass snowcovered cloudy day gliding textures scenic snowfields outdoors rugged terrain snow patches remote snowcapped peaks polar region snowdrifts dramatic pure crisp air vast unspoiled wintertime landscape landmark serac permafrost frost plateau cinematic