To get the Natural History Museum's take on caves, trek out to the Rocks Gallery in the farthest reaches of the second-floor Hall of Geology, Gems and Minerals. As acidic groundwater dissolves the calcite in the limestone, cracks form, gradually enlarge, and eventually turn into tunnels. 2001CitySearch Inc. All rights reserved. Perly Inc. The textual, graphic, audio, and audiovisual material in this site is protected by United States copyright law and international treaties. You may not copy, distribute, or use these materials except as necessary for your personal, non-commercial use.
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