Starved Rock State Park
Starved Rock State Park
Western Central Till + Lowlands, Illinois
Sawatch Range + Elk Mountains, Colorado
Ammonoosuc Ravine + Jewell Trail Loop
Guadalupe Mountain National Park
Guadalupe Mountains National Park
Guadalupe Mountains, Texas
Colorado Plateau, Arizona
Great Smoky Mountains National Park
Sawatch Range + Elk Mountains, Colorado
Lake Superior North Shore, Minnesota