Hilo Tropical Waterfalls-Swim under a 120-foot waterfall, learn history of Hilo, enjoy the sights
https://www.hawaii-forest.com/tours/hilo-tropical-wonders/
Take Tours- Tour national park, Akatsuka Orchard Gardens, and Rainbow falls.
https://www.taketours.com/hilo-hi/1-day-big-island-hilo-tour-082-3695.html
Rainbow Falls
Small group Waipio Valley and Waterfalls Adventure-See 3 Big Islands most famous waterfalls; Hiilawe falls, Akaka Falls, and Rainbow Falls. Tour Waipio Valley and Hamakua Coast
https://www.tripadvisor.com/AttractionProductReview-g60872-d11454352-
Small_Group_Waipio_Valley_and_Waterfalls_Adventure-Kailua_Kona_Island_of_Hawaii_Haw.html
Hawaii Volcanoes National Park Tour-Educational, sightseeing, Big island Candies, Beaches, Gardens, and much more
https://www.robertshawaii.com/hawaii-island/tours/hilo-volcano-tour/
Hilo Bay and River Falls Adventure Boat Tour-Calm waters of Hilo bay see sea turtles and pass under the singing bridge.
https://www.shoreexcursionsgroup.com/tour/hilo-bay-and-river-falls-adventure-boattour/HWHIBAYFALLS
Beach Snorkel at Black Sand Lagoon with Turtles-Brackish water bays and lagoons in Hilo.
https://www.shoreexcursionsgroup.com/tour/beach-snorkel-at-black-sand-lagoon-withturtles/HWHIBCHSNKL
Big Island Heli/Zippin Volcano- Go through multiple ziplines, going in an air-conditioned aircraft over Kilauea, and enjoy dinner at the volcano winery.
https://bestof-hawaii.com/tours/big-island-kapohokine-adventures-helizippin-volcano-hilo/
Kilauea Crater
Big island Craters and Coffee-Fly over Kilauea volcano, summit, and the vent, land at Ka’u Coffee Mill for a tour and tasting journey.
https://bestof-hawaii.com/tours/big-island-craters-and-coffee-hilo-big-island/
Roasting Coffee Beans
Doors off Lava &rainforest Adventure- be on a door off flight over Kilauea and nearby rainforest and waterfall.
https://www.hawaiidiscount.com/tours/bigisland/helicopter-tours/fire-and-falls-doors-off.htm