inside an ice cave in vatnajokull, iceland, the ice is thousands of years old and so packed it is harder than steel and crystal

adventure alaska amazing arctic background beautiful beauty blue cave cavern clearnwinter cold crystal entrance exploration extreme frost frozen gem gemmy glacier glass glassy greenland harder ice iceberg iceland inside island landscape mountain national natural nature nbeautiful north old packed park sapphire skaftafell steel stunning svalbard than thousands tour transparent travel traveler tunnel underground vatnajokull water white winter wonderland world years