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Natural bridge caverns

The caverns are located near the city of San Antonio, Texas, in the Texas Hill Country next to the Natural Bridge Wildlife Ranch, a drive-through wildlife safari park. Limestone formed millions of years ago, when the region was covered by a shallow sea. Over time, marine organisms like corals, shells, and other calcium-rich materials accumulated on the sea floor. These layers of organic matter and minerals were compressed and cemented together, forming limestone. # Sanantonio # limestone #naturalcrystals #limestone #cave