By eHow Sports & Fitness Editor
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Don't forget your camera when visiting Grapevine Hills in Big Bend National Park. Grapevine Hills was formed when hardened underground magma was exposed by erosion. The exposed granite has weathered into wonderful rock formations, pinnacles, granite boulders, and a natural stone arch. An easy day hike of about 2.2 miles, Grapevine Hills is best explored during the cooler fall through spring months.
eHow Sports & Fitness Editor