an old mine shaft filled with ice and snow at salmon glacier

abandoned alaska business cave cavern closed cold creepy danger dangerous dark darkness dirty doorway dungeon entrance excavated excavation forbidden galvanized geology goldmine goldmining hazard hazardous historic history ice icy industry inside interior klondike melting metal metallic mine minerals mineshaft mining north northern obsolete old pipes retro rock rusting rusty scary shaft sheeting snow spring springtime stone structure thaw thawing tunnel tunneling unsafe used vintage weathered wet wood wooden