There are few things less inspiring than a drab, gray pavement, which is why most of us tend to look up when we're walking the streets. Well, that and to avoid hitting a lamp post.
But go anywhere that Eduardo Relero has roamed and the opposite is likely to apply. The 3D street artist from Argentina has created optical illusions around the globe that include giant feet sticking out of gaping holes in the ground and ancient figures lying in tombs that are actually just the tops of public benches.
The 48-year-old began his painting career on the streets of Rome in 1990 and has since gone on to create breathtaking murals in Germany, France, Spain and America.
For some examples of the street art that makes Banksy looks positively unambitious, click on the gallery below.