Lava Beds National Monument in Northern California is one of the best areas to visit. First is the fact that Lava Beds has the largest number of lava tubes (caves) in the world. These caves are open to the public and people are free to explore them. Beyond the lava tube caves, Lava Beds offers so much more to see. Tule Lake is next door to Lava Beds and has numerous wildlife that's easy to spot.
This is the full video with tips on seeing the caves.
Filmed with a Panasonic HMC-40 Camera.