Street art is visual art created in public locations. Those public locations can be walls, streets, pavements and even stairs. Check out these Awesome Stairs Street Art, and there is surely something which can inspire you.
Portuguese artist Alexandre Farto (aka “Vhils”) - Lisbon, Rua de Cascais in Alcântara near the Santo Amaro Docks and represents the American street artist Brad Downey, his friend. (all rights reverved by Lisbon Lux)
This illustration is really nice it shows a variety if different things and i really like how easily it gets the message across. Instead of the balloon containing nothing it has water with fish in which i think is a really good idea.