Bastianos Bunaken Dive Resort is a PADI dive resort on Liang Beach, Bunaken Island, inside Bunaken National Marine Park. It teaches scuba and freediving courses, guides daily reef dives, and runs sister operations at Bangka Island and the Lembeh Strait, including multi-destination dive safaris across North Sulawesi.

House boats reach the island's signature wall dives, from the Lekuan walls to Fukui Point and Mandolin, where sheer coral faces drop into deep blue water and green turtles rest on ledges. Visibility is best in the dry season from March to October. The resort holds a 4.3 Google rating from more than 150 reviews.