Wow, musta washed that li'l gazebo with Tide - your whites are SUPER-bright! I love this picture though. Fall is my favorite season and you definitely got it in this shot. My meaningless opinion - crop out the gazebo completely... cover it up with your hand while looking at this pic. and you get a totally different effect with just the tree and bench.
Nice composition and the trees are lovely. The gazebo though..seems to be leaning (used a wide angle lens maybe?) and the pillars, duck on top and roof seem grainy or not sharp.