Oklahoma transitions from eastern deciduous forests to western shortgrass prairies, resulting in diverse parks.
* **Wichita Mountains Wildlife Refuge**: Home to free-roaming herds of American bison, Texas longhorn cattle, and Rocky Mountain elk amid ancient granite mountains. * **Beavers Bend State Park**: Located in the forested southeastern "Green Country" (Kiamichi Mountains), highly popular for trout fishing, hiking, and cabin rentals. * **Tallgrass Prairie Preserve**: The largest protected remnant of tallgrass prairie left on Earth, located in the Osage Hills. * **Turner Falls Park**: Features a 77-foot waterfall in the Arbuckle Mountains, creating popular natural swimming pools.