This tour is a once in a lifetime! You are brought to the highest point near the equator, above the clouds, to where all the world's telescopes are. If you are a sci-fi or astrology fan or just science it is a must! Ridge our tour guide was a native hawaiin and amazing at all the history. They picked us up in Kona, saw the most amazing sunset i have ever seen in my life at 13,800 ft. They stopped along the way so you get used to the altitude, gave us gloves and parkas (but it felt like fall in New England). We cant stop talking about it and showing pictures. This tour was the best thing we have all ever done in Hawaii other than the Volcanoes National park. We took our sixteen year old- She was over the stars on this one! If you have breathing issues or back problems that would be my only caution and hope you get Ridge as your tour guide but they were all amazing!!!