Did you know that caves have tunnels carved by wind and water? Mammoth Cave in Kentucky has more than 400 miles (644 kilometers) of tunnels. Discover more intriguing facts in Caves, an Exploring Ecosystems book.
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Did you know that caves have tunnels carved by wind and water? Mammoth Cave in Kentucky has more than 400 miles (644 kilometers) of tunnels. Discover more intriguing facts in Caves, an Exploring Ecosystems book.
Read Less
