Has anyone been to the Hana Lava Tube (AKA Ka'eleku Caverns) on the Hana Highway-left onto Ulaina Road at the 31 mile marker at Waianapanapa park? Is the 40-minute self-guided tour worth $11.95? We plan on driving the Hana Highway in late January, now that the road is open to the Lindbergh grave and Haleakala. 
