Kaaawa Valley/Kualoa Ranch = Huge Climbing Hill in Pilot and Bridge that Charlie fell

Surprisingly due to the magic of camera angles this was the hill that was used for the long climb that Kate, Sawyer, Charlie, Sayid, Boone & Shannon made on the way to getting high ground to listen to the radio in the Pilot.

If you'll notice the two poles its also whats left of the bridge that Hurley crossed and that fell on Charlie when Hurley was trying to find the French Woman.