man inside a melting glacier ice cave. cut by water from the melting glacier, the cave runs deep into the ice of the matanuska

active adrenaline adventure alaska athlete beautiful beauty blue cave caves change climate cold crevasse danger dark experience explore freeze frozen gas glacier global greenhouse guide ice icy landscape light male man matanuska matnauska melt melting moulin nature scenic sightseeing silhouette summer tourism travel tunnel underground warming water wild wilderness winter