Here is even clearer:
https://api.windy.com/api/webcams/v2/list/limit=50/country=ES?show=regions&key=XXXXX
response:
{"status":"OK","result":{"offset":0,"limit":50,"total":1506,"regions":[{"id":"ES.52","name":"Aragon","count":69},{"id":"ES.53","name":"Canary Islands","count":79},{"id":"ES.51","name":"Andalusia","count":67},{"id":"ES.56","name":"Catalonia","count":235},{"id":"ES.55","name":"Castile and León","count":98},{"id":"ES.07","name":"Balearic Islands","count":50},{"id":"ES.54","name":"Castile-La Mancha","count":64},{"id":"ES.34","name":"Asturias","count":116},{"id":"ES.59","name":"Autonomous Community of the Basque Country","count":56},{"id":"ES.58","name":"Galicia","count":60},{"id":"ES.57","name":"Extremadura","count":8},{"id":"ES.31","name":"Region of Murcia","count":8},{"id":"ES.32","name":"Navarre","count":22}]}}
Many other regions fault...