This question already has an answer here:
I have a relative in a town called Les Pieux in Normandy.
What is the correct preposition to use to say, for example, that I am in this town?
I understand from this question that we would use "aux" for plural countries/regions but am unsure of the equivalent for towns.
I have heard suggestions of:
Je suis à Les Pieux.
Je suis aux Pieux.