When you visit the area around Pic Carlit & Lac du Bouilloses you need to take someone with you - there is too much beauty there for one person alone to absorb.
A multitude of mountain lakes (16+), spread over over a large area, with the ability to camp nearly anywhere between 7pm - 9am. Swimming in the lakes are prohibited though.
Summiting Pic Carlit (2921m) is also a popular destination.