1: 1. Wolf pack stalking prey 2. Geysers erupting fiercely 3. Grizzly bear hunting for food

2: 4. Bison stampeding through park 5. River rafting adventures 6. Close encounters with wildlife

3: 7. Thermal pools bubbling dangerously 8. Hiking in bear territory 9. Kayaking in Yellowstone Lake

4: 10. Camping near wild animals 11. Breathtaking canyon views 12. Hot springs temperature surprises

5: 13. Wolf howls at night 14. Old Faithful's powerful eruptions 15. Moose spottings while hiking

6: 16. Bear cubs playing near roads 17. Winter snowstorms in park 18. Elk bugling during mating season

7: 19. Brave tourists approaching bison 20. Thrills of wildlife photography 21. Observing active volcanism

8: 22. Geyser encounters on trails 23. Tracking elusive mountain lions 24. Fly fishing in park rivers

9: 25. Climbing precarious rock formations 26. Rendezvous with park rangers 27. Stunning sunsets over geysers.