Places we recommend:
Akatsuka Orchids - for exotic & rare plants
Fuku Bonsai - amazing bonsais (they will teach you how to bonsai)
Hawai'i Animal Quarantine Rules - before you bring your pet check here....
Hawai'i Tropical Botanical Gardens - amazing tropical gardens with rare exotic plants
Hawai'i Volcanoes National Park - see Kilauea volcano & active lava flows
Hilo Bay Cafe - we recommend everything on their menu.
Kona Joe - great Kona coffee
Mauna Kea Observatories - for Astronomy and Hawaiian culture
Mokupapapa Discovery Center for Papahanaumokuakea Marine National Monument
Nautilus Dive Center - we highly recommend Bill & his crew
Seaside Restaurant - try the Furukaki Salmon
Wa'akaulua Sailing Adventures - Hawaiian Sailing Canoe Tours