From the Pacific Ocean to the summit of Mauna Kea, the Big Island of Hawaii offers plenty of air, land and sea excursions to satisfy everyone. Topping the list of things to do is a visit to Hawaii Volcanoes National Park. Start at the visitor center and talk with park rangers, visit Jaggar Museum and peer into Halemaumau Crater, walk through Thurston Lava Tube, and explore the many park trails. Highlights also include snorkeling with manta rays (found only here!), snorkeling at pristine Kealakekua Bay, ziplining, riding custom kayaks into century-old irrigation channels (another Big Island-only activity), exploring tropical gardens and stopping at Panaewa Rainforest Zoo & Gardens, the only zoo in the nation located within a natural tropical rainforest. And if you love Kona coffee, drive the Kona Coffee Belt and visit the many Kona coffee plantations and shops along the way.