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Oregon Caves National Monument

Oregon Caves National Monument, wildlife preserves and limestone caves located on 480 acres (192 hectares) in the Siskiyou Mountains of Oregon. Vast stalagmites and stalactites fill the limestone caves, which are surrounded by forests with trees as old as 400 years and up to 180 ft (55 m) tall.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Olympic Mountains to Palermo