Colossal Cave was etched by acid rather than just by running water like most caves (apparently).
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Used a flash and a tripod here.
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Using a tripod in a cave while being rushed by the guide doesn't make for good pictures.
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No flash used here. Check the exposure time (properties top right hand corner of the window when viewing the image).
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Again no flash. No wonder it's a little blurred.
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2 second exposure.
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Twisty little passages all alike.
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Image quality is a little better but it's hard to see what you're looking at.
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One of those Amethest thunder egg things.
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View towards Tucson about 20 miles away.
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