Puzzle Completed!....or not

During Part 3 you will here of a personalized puzzle, well here it is. This is a link out of Part 3 that would've continued it on forever. So on Sunday we went to my Aunt and Uncle's house in New York. From them one of their gifts was a personalized puzzle of where I live. My house is the center piece and it goes four miles north and south of my house, and six miles east and west of my house. While I was there I opened the bag, and started on the puzzle. I managed to get the border, a few lakes, the major river, and the highway. But then it was time to go (how we transported it in post prior to this), and we packed it up. Once I got home I brought everything upstairs, including the puzzle, I put it on top of this window seat. When I woke up I started back up on it. I managed to get a lot done all by myself from 9:00am to 4:00pm. Then I brought it down two flights of stairs to the kitchen in its transporting box. From there everyone chipped in. At 9:20pm we finally finished this puzzle. Can you believe it took over one day! It was only 400 pieces, so why did it take so long you ask? Well,....one every piece had the same shade of green, and we had no picture reference. You had to know everywhere around you. Not easy, I tell you, not easy at all. You can say what you want, but it's not easy. Here are some pictures:

Yay! I'm finally done! Wait, WAIT! What's this, is that a missing piece?! Ahhh!

Has anyone seen this missing piece? 

Oh thank god, it was only on the ground! Woo, I think my heart skipped a beat there.