If you want to visit Mars (it is a one way trip), now you can apply for it. The selection is a four round process
Mars One is a not-for-profit organization whose goal is to establish a human settlement on Mars through the integration of existing, readily available technologies from industry leaders world-wide. Mars One intends to fund this decade-long endeavor by involving the whole world as the audience of an interactive, televised broadcast of every aspect of this mission, from the astronaut selections and their preparations to the arrival on Mars and their lives on the Red Planet.
You can read more about the Mars One project here and can apply if you are interested.