Inside the glacier ice cave at Matanuska Glacier. Such caves form occasionally in different parts of glacier, they can collapse and emerge in other parts. Most glacier caves are started by water running through or under the glacier. This water often originates on the glacier's surface through melting, entering the ice at a moulin and exiting at the glacier's snout at base level. Heat transfer from the water can cause sufficient melting to create an air-filled cavity, sometimes aided by solifluction. Air movement can then assist enlargement through melting in summer and sublimation in winter. #matanuska #matanuskaglacier #glacier #glaciercave #alaska #travel #roadtrip #natgeo #likes #instalike #instagood #bestoftheday #photooftheday #instacool #instago #all_shots #follow #webstagram #colorful #picoftheday #livefolk #discover_landscapes #main_vision #master_gallery #world_shotz #fantastic_earth #ig_masterpiece #ournaturedays #moodygrams #exclusive_shots (at Matanuska Glacier) https://www.instagram.com/p/CEH5BFKpXTf/?igshid=159b6czhjus2t