One popular thing to do in Cerdanya is to take flight in a glider. You can bring your own or you can take flight with an instructor.
Check out the Cerdanya gliding video below.
Here’s a link to the airport ( aerodrom de la Cerdanya ) in the area. http://www.aerodromlacerdanya.cat/flypyrenees/lacerdanya-getting-there.html
You can find prices for gliding at the following link: http://volavela.es/