English: Park service map from interpretive sign showing a lava mold cave, built from voids remaining after lava inudated tree trunks. It is in Mt. St. Helens National Monument in Washington, USA
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{{Information |Description={{en|1=Park service map from interpretive sign showing a lava mold cave, built from voids remaining after lava inudated tree trunks. It is in Mt. St. Helens National Monument in Washington, USA}} |Source=Own work by uploader |Au