Lanai Lookout (view panorama) is located on Oahu's southeast shore right on Kalanianaole Highway. It is one of three main roadside lookout points on this scenic stretch of coastline (the other two are the Makapuu Lookout and the Halona Blowhole Lookout). The lookout point has a small parking lot carved into the sea cliff. On a clear day you can see three neighbor islands from here, not just the island of Lanai, but Molokai and Maui as well. Maui will be a bit tricky to make out because it is behind Molokai. And the main feature of Maui that you'll be able to see is Mt. Haleakala (Maui's 10,023 foot tall mountain).
Lanai Lookout Overview
Popular lookout near Oahu's southeastern tip
Up to three neighbor islands can be seen on the horizon on a clear day
Good spot for whale watching in the winter months (December to March) - bring binoculars