From the brewery:

First brewed back in 2004, Curieux was our initial foray into barrel aging. To make Curieux, we take our Tripel and let it age in bourbon barrels for six-to-eight weeks. Once that time is up, we take the beer out of our cold cellars and blend it back with a portion of fresh Tripel. The resulting rich, golden ale features smooth notes of coconut, vanilla, and a hint of bourbon.