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Making America's Best Idea Even Better
Oregon Caves National Monument100 years of Discovery
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Oregon Caves National Monument
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Find out about the lastest happenings at Oregon Caves here and also on the Centennial Celebration.
Squeezing through the rocks during Oregon Caves Off-Trail Caving Tour
Introduction to Caving Tour
Find out more about the caving tour offered at Oregon Caves.
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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.

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Last Updated: July 03, 2009 at 13:12 EST