Nature

National:
Organisations offering more than one area

Country Connoisseurs, Bird-watching & Cookery in Spain
Cox & Kings, natural world holidays
Ellison Roberts, the art of adventure

Andalucia

Briskas, dolphin watching, sport fishing, boat trips, Estepona
Dolphin Safari, daily excursions, La Linea
Frontier Holidays, walking & birdwatching in Andalucia
Pescatún, dolphin & whale watching, sport fishing, Sotogrande
Prestige Fishing Tours, dolphin watching, sport fishing, boat trips, Estepona
Whale & Dolphin, excursions & courses, Tarifa

Aragon

Asturias

Balearics

Basque Country

Canaries

Cantabria

Castilla-La Mancha

Castilla-León

Fat Birder, world birding, Castilla y León

Catalonia

Extremadura

Galicia

Madrid

Murcia

Navarre

Rioja

Valencia