The world has changed a lot over the years, and those changes can be noticed in photos from the past. Buildings have been built, demolished, and renovated. Technology has changed spaces, and bigger populations make for busier streets. There is so much being done around the world, contributing to major advancements. This means that many major cities, monuments, and other popular sights have altered in appearance slightly or drastically with time.

Some cities are honestly unrecognizable in the past. Some now abandoned places were once popular hangout spots, some relics were once major advancements, now just normal structures. Back then, the world was a bit quieter than it is now, so it's cool to see how some very busy places looked when they were empty.

There are tons of photos online of cities, historical buildings, and other famous sights back in the past compared to now. Here is a collection of 24 side-by-side photos from life in the past showcasing these interesting differences in places then and now.