...we heard from a YMCA Camp Erdman staffer that last week they had filmed there. He told us an interesting story of how the production crew built a new barracks/house just so they could blow it up. He said the first explosion wasn't big enough, so they did it over again, finally getting the explosion they wanted. One part of the camp certainly had the ashes all over the ground to prove it!

Complete spoiler

Stills from Episode 9, The Shape of Things To Come - the Barracks Losties prepare for battle.