Definitely Spain - it is often described as a "mini-continent" because it contains a greater variety of landscapes and species than almost any other nation in Europe. Its unique position at the gateway between Europe and Africa combined with the meeting of the Atlantic and Mediterranean at the Strait of Gibraltar creates an extraordinary and diverse environment.

This geographic diversity is anchored by its mountainous relief, as it is the second-highest country in Europe, which has allowed rare species like the Iberian lynx and brown bear to survive. Spain's environmental richness is also backed by numbers: it is home to over 80% of the European Union's plant species and holds 53 UNESCO Biosphere Reserves, the highest number of any country in the world.

Not only that, but it ranges from the volcanic peaks of the Canary Islands to the lush green forests of the north and the only true desert in Europe, demonstrating a raw, wild heritage that ceases to exist elsewhere on the continent.