Thousands of icicles, including some that stretch from floor to ceiling, form in the Guler Ice Cave near Mount Adams, Washington. The cave is a partially collapsed lava tube formed during an eruption of Mount Adams during the past 20,000 years. One end of the cave is lower than the other and scientists think that traps cold air, which keeps the cave icy even during the summer. The Guler Ice Cave is located near the community of Trout Lake.
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