We rented a car & drove to Volcanoes National Park. It was amazing! The steam vents were so hot! A stop at the Visitor Center was a must & Park Rangers gave tips on highlights of the park. The volcano rim drive was closed during our visit due to high levels of sulfur dioxide. Others in our group went to the Mauna Loa Nut Factory & enjoyed that as well! At night, our ship passed by the volcanoes & we could see the red glow. This was also narrated by our ambassadors.
Kauai was, in my opinion, the most beautiful island. We took a 55 minute helicopter ride where. We got to see Waimea Canyon up close with tons of waterfalls & a spectacular view of the Napali Coastline. There was a nice beach with plenty of shops within walking distance to the ship and the children enjoyed spending time there. We were there over the 4th of July & were able to see the fireworks from the ship.
We actually took a taxi ride to Kona Coffee company, Cook's Bay, the Painted church & the City of Refuge. We didn't actually go into the City of Refuge, unfortunately, because we had limited time. The children enjoyed renting paddle boards on a nearby beach. I also toured the Hulihee Palace ($8), which was small & self guided, but it had very helpful docents.