MOLI'I GARDENS = Season 6 Pier Gun Fight

Here they filmed the gun fight in season six when Jack, Kate, Hurley, Sayid, Sawyer, Sun & Jin entered the submarine before it brew up. A lot of the background props etc had been removed by now.

Kaaawa Valley/Kualoa Ranch = Meeting between Jacob & MIB

This is where Jacob approached and met with the Man in Black at the end of the Richard episode in season 6.

Clash of the Titus!

Titus Welliver was hounded by a TMZ pap and he bothered to answer a few (non-spoilery) questions.