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Oregon Caves National MonumentHiking Oregon Caves trails.
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Oregon Caves National Monument
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Find out about the lastest happenings at Oregon Caves.
Depictions of a Cave Tour
Depictions of a Cave Tour
Oh the wonders you'll discover inside the earth!
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Acid dew dissolves the cave wall to make small pock marks.  

Did You Know?
Carbon dioxide mixes with water that condenses on the wall of the cave to create a very weak acid. Over long periods of time this "acid dew" eats away at the marble walls of Oregon Caves making the cave larger.

Last Updated: March 28, 2007 at 14:31 EST