To make it a full sentence, you need to add the verb. For example:
* "Quelle ville tu habites?" - What city do you live in?
* "Quelle ville tu aimes le plus?" - What city do you like the most?
* "Quelle ville tu veux visiter?" - What city do you want to visit?
So, the English translation will depend on the verb you are using to complete the phrase.