Crystal Cave, Show cave in Berks County, Pennsylvania, US
Crystal Cave features underground passages with calcite formations, limestone walls, and mineral deposits extending through multiple chambers beneath the earth's surface.
The cave, discovered in 1871 by William Merkel while extracting limestone, opened as Pennsylvania's first show cave to the public in 1872.
Geologists from universities across Pennsylvania visit Crystal Cave to conduct research on mineral formations and study subterranean environmental conditions.
The cave maintains a constant temperature of 54 degrees Fahrenheit throughout the year, requiring visitors to bring light jackets even during summer months.
Crystal Cave contains specific formations called flowstones, created by centuries of mineral-rich water flowing down the cave walls leaving calcium carbonate deposits.
Location: Pennsylvania
GPS coordinates: 40.52570,-75.84260
Latest update: May 14, 2025 00:09
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