Big Island Grand Circle Island Tour. This Big Island circle tour hits all the highlights of the stunning Big Island of Hawaii, from the steamy landscape of Volcanoes National Park to the reefs of Kealakekua Bay. While riding in a comfortable minibus, watch out the window as the landscape changes with every bend in the road, from tropical, misty valleys full of ferns to a barren, black lava coast. This Grand Circle island tour includes round-trip transport from Kona, with pickup and drop-off at your hotel. Book and Save 20%! Big Island Grand Circle Island Tour.