The Halona Blowhole is located on the Windward side of Oahu, about three miles northeast of Hanauma Bay. Several scenes were filmed in this area, including
* Eadie Hastings leaped to her death in "Up Tight" (Season 1).
* Corpses were found in a cave in "Highest Castle, Deepest Grave" (Season 4).
* Chang (Kwan Hi Lim) tossed the briefcase containing the guns used in the murders in "Didn't We Meet at a Murder?" (Season 4).
* Ralston (Alan Vint) killed Ella Syzmanski (Robyn Millan) in "R&R&R" (Season 4).