The feeling of nostalgia is a complicated one. It's both a happy and sad feeling; it's the definition of bittersweet. Nostalgia is a little different for everyone. Everyone has different fond memories and items from childhood that bring them back. There are some things, though, that trigger nostalgia for large groups of people. Some items and images are just so iconic that everyone remembers them and the great memories attached. Whether it's a certain store, an old toy or classic video game, or some really specific piece of decor, certain things are just nostalgic for existing.

Reddit's /r/nostalgia is a subreddit where people post all of the most nostalgia-inducing things they see. The subreddit mainly contains '90s nostalgia, but there are some newer and older relics in there as well. Anyone is likely to find something that will make them feel nostalgic inside. Here are just 25 of those bittersweet memories trapped inside of photos forever.