Between 1890 and 1947, the chief mode of transportation for Oahu's sugar mills was the Oahu Railway and Land Co.'s narrow-gauge trains. The line carried not only equipment, raw sugar, and supplies, but also passengers from one side of the island to the other. You can relive those days every Sunday with a 1 1/2-hour narrated ride through Ko Olina Resort and out to Makaha. As an added attraction, on the second Sunday of the month, you can ride on the nearly 100-year-old, custom-built parlor-observation car belonging to Benjamin F. Dillingham, founder of the Oahu Railway and Land Co.