The appearances of places and buildings change a lot over time. What places looked like decades ago are not how they appear today. This could be due to a number of things, like an increase in technology, buildings, and population. Technology has advanced in insane ways, buildings have been built and cities have expanded greatly all over the world. This means that many major cities, monuments, and other popular sights have altered in appearance. Some of them are almost unrecognizable, which is kind of crazy. It's pretty cool to see just how much things have changed in a relatively short amount of time, it can be a bit scary too.

The huge skyscrapers across New York were once never there. All of the hustle and bustle in Vegas was once nonexistent. Some now abandoned places were once popular hangout spots, some relics were once major advancements. Seeing what kind of history is behind very popular or even small scenes is interesting and fun.

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 25 side-by-side photos of how places looked way in the past and how they look today.