You know the hallway. Many of us grew up in homes with a long hallway. In many of those homes the hallway was where the family photos were hung.
You can change up how that hallway looks by changing the focus. Make the end of the hallway your focus. Hang a vibrant photo that draws the eye down the hall. Something that makes you want to reach the end and take a closer look.
Many of these hallways end with the door to a closet. Don't let that stop you. You can hang photos on doors. Use appropriate hanging hardware for the structure of the door. Be sure to use some tabs on the bottom corners so the picture doesn't bounce when the door is opened and closed.
One photo hung at the end can change how you look at your hallway.