If I’m picking one, and only one right now, I’d have to say Spain: For a long time now I’ve wanted to complete the Compostella de Santiago, it a 800km hike and pilgrimage from the French Pyrenees mountains to the Cathedral of St John in Santiago, and takes a fit person around three months, it would take me a bit more than that at the moment.
I would love to return to Spain, then I'd love to visit Greece, Albania, Japan, The Netherlands, Germany as well as many other countries in Europe and throughout the world.
Germany (again), France (again), Sweden (again), Norway, England, Iceland, Ireland, Spain (again), Finland (again), Denmark (again), Switzerland (again), Belgium (again), and many others, I like european countries, especially in central and northern Europe.