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Oregon Caves National MonumentRanger programs at Oregon Caves National Monument.
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Oregon Caves National Monument
Virtual Tour

Do you want a sneak preview of the cave tour? Be first in line to experience the Virtual Tour.

We offer two different experiences of the virtual tour. You can view images of the cave tour as how it will be seen on your tour or you could view drawings of a Ranger's rendition of the Oregon Caves (both are in PowerPoint format). 

If you do not have the software to open these files, you can view the images on the Photo Gallery.

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: June 29, 2007 at 17:08 EST