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Mammoth Cave National Park Location: Louisville, Kentucky Location: more than 400 miles Difficulty: Moderate Features: sinkholes, underground rivers, streams and springs, spelunking, hiking,

Location: California 95043, United States Features: Hiking trails, rock climbing, talus caves, trails, bird watching About the Pinnacles National Park It

Location: Wind Cave National Park, South Dakota, USA Features: Cave tours, wildlife viewing, hiking trails, campground About the Wind Cave National

Location: Tulelake, CA Length: 3.0 miles Difficulty: Easy Features: Kid Friendly, Hiking, Nature Trips, Walking, Bird Watching, Views, Wildlife, Historic site About the Thomas-Wright Battlefield Trail The Thomas-Wright Battlefield Trail is an

Location: Tulelake, CA Length: 5.2 miles Difficulty: Intermediate Features: Backpacking, Camping, Hiking, Nature Trips, Walking, Bird Watching, Cave, Views, Wildlife, No Dogs About the Three Sisters Loop The Three Sisters Loop Trail is a