The 100 foot hole is located on Oahu. It is on the south shor of the island, offshore from the Waikiki Hotels. The boat charters usually depart from the Honolulu Harbor. The Honolulu Harbor is about a 5 minute drive from Waikiki. It takes about a 20 minute boat ride to get to this dive site. The depth of this dive is about 90ft.The dive plan is 90ft for 20 minutes The 100ft. Hole is a large rock like reef and around it as far as you can see it is surrounded by sand. On the sides of this large reef, there is a hole that goes through it. It looks like a huge ledge. Inside the ledge there are a bunch of white tip sharks that usually hangs out there. The reef has a lot of different types of marine life living in it. Such as large Angler fishes, Butterflies, Wrasses and very large Amberjacks. This is a great dive if there is no current. This dive is rarely done, because of the strong currents that are usually there. The temperature ranges for 70-75f. (24-26C.).The visibility averages about 80ft