It seems like every 30 years or so, wallpaper comes back into popularity in the design world. While wallpaper conjures images of floral-themed nightmares from our grandparents' basements for many of us, it has turned into a trendy design choice that can make an impact on any room. With advancements in technology and more gorgeous designs than we could have ever imagined, wallpaper might be the design element that's missing in your home. From creating an accent wall in your hallway or living room to completely covering the walls in your bedroom for a romantic look, these before and after photos show just how much wallpaper can change a room.