Loved it. A surprising find at 14,000 feet. - One of the better excursions on the island I enjoyed. Especially recommended if you are intrigued by observatories, lava flows and want something completely different. Recommended visits are for sunrise or sunset but we were there mid-day and enjoyed it any way - and only a light jacket was necessary with the sun shining. An expensive tour but it is a small group and the park requires four-wheel drive vehicles to go to the summit. There is a visitor center with several exhibits and souvenier shop at about the 9,000 ft. level which regular cars can visit. The mountain itself has a variety of different kinds of lava, lots of different observatories which you can walk around but not enter. Several peaks have Hawaiian shrines on top which you can view from the distance and the Rainbow falls was an added bonus. The guide was very experienced and provided lots of commentary during the trip. He also provided water, snacks and heavy coats if desired. Overall, I was very impressed.

Worst tour we've ever taken with Viator who we usually are very happy with! - I booked this trip for 4 of us and paid almost $1300. I have traveled and toured many times with Trip Advisor and Viator, and never have I been so disappointed. First, the driver, Sai, wasn't certain where she was going. She had to turn around twice and head in the other direction. The one waterfall wasn't spectacular, but that was okay. Next, we headed to the top of the mountain. We made it as far as the parking lot, and she pointed to a building that was not the visitor center. (Clearly, she'd never been.) We found the visitor center where she had us wait for 45 minutes. Virtually nothing to see or read. When we got back into the rented vehicle, the guard wouldn't let us go up the road because it was too windy. So, she had us get out and walk around for another 30 minutes. We were supposed to have water provided, but she had none. She did go back into the visitor center, bought a $27 mug which she charged to my sister, and then filled it with tap water. She should have been able to call ahead and ascertain that the way to the top was closed. Afterwards, she dropped us at a grocery store, and then I suggested we go to the volcano, but she said it was too far. (Remember, we thought we were paying for a 6-hour tour.) So, she dropped us at the 12-acre zoo where we spent 45 minutes. After that, she dropped us back at the boat.