Narrower Terms (17)

• Black Kettle National Grassland (Okla. and Tex.)
• Chickasaw National Recreation Area (Okla.)
• Deep Fork National Wildlife Refuge (Okla.)
• Honey Springs National Battlefield (Okla.)
• Little River National Wildlife Refuge (Okla.)
• Oklahoma City National Memorial (Okla.)
• Ouachita National Forest (Ark. and Okla.)
• Ouachita National Recreation Trail (Ark. and Okla.)
• Ozark Plateau National Wildlife Refuge (Okla.)
• Platt National Park (Okla.)
• Rita Blanca National Grassland (Okla. and Tex.)
• Salt Plains National Wildlife Refuge (Okla.)
• Sequoyah National Wildlife Refuge (Okla.)
• Tallgrass Prairie National Preserve (Okla.)
• Tishomingo National Wildlife Refuge (Okla.)
• Washita Battlefield National Historic Site (Okla.)
• Wichita Mountains Wildlife Refuge (Okla.)