Translation:Where do you live?
'Vivir' is the verb in its infinitive state. It often translates to 'to live' or 'living'.
Donde quieres vivir = Where do you want to live?
Creo que me gustaria vivir en españa = I think I would like living in Spain.
One word of caution... do not confuse the second use here with the word 'viviendo' which also translates to 'living'. That is used solely in another tense called present continuous and is paired with the verb 'estar'. That tense implies that the action is currently ongoing.
Estoy viviendo en españa = I am living in Spain