I had no idea either until the guy at the lumber yard told me. Buffalo wood has grooves taken out of it, and have a "hand cut" style. It lookes like someone chipped away at it for a few days with a big carving knife. The guy at the lumber yard said it's real popular on houses? Can't say I have even seen it on a house before. It only cost me $30 bucks for all the lumber to do my entire bed! There are more pictures in the photobucket album of the wood if you want to see it better. I'll take better pictures in a few days.