If you think of great works of art, your mind usually goes towards paintings made over a hundred years ago. They're also probably hanging in some huge museum in Europe. Despite that, there's amazing art all around us that we often ignore.
We're talking about graffiti. Graffiti's become a really negative label, but it goes beyond tagging and writing the F word on the side of a building. There are tons of artists doing amazing work on the streets all over the world. And it's not just Banksy.
Here's a look at some truly amazing street art that people walk past every day.