We have one semi-long hallway in our house, and until about a week ago it was very empty and very boring. We've only been in the house for three months though, so it's really not as lame as it sounds. I knew I wanted to do a gallery wall, it just took a while to gather all the frames and pictures that I needed to get it done. It really didn't take long once I got started, just a couple trips to store get frames, and a trip to Costco to pick up my pictures. And I am happy to report that there are only a couple extra nail holes in the wall. I would call that a major success!