From this evening's episode

We were marveling during the episode tonight at what a good job the Lost crew does at making Hawaii look like other parts of the world. Tonight's ep included locales such as Moscow and the Dominican Republic (in the picture), as well as Sayid's hometown of Tikrit in Iraq. But it's all done right there on location in Hawaii.

And just a fantastic episode tonight in general. Sayid may, in fact, have altered the entire "history" of the island, but we will see...