New Zealand. I may be remembering my trip there with rose tinted glasses but I swear it was the most wonderful month of my life.
The country is truly spectacular environmentally, full of mountains, volcanos, geothermal activity ect. (a geologists wet dream!). I think it must be the only place on earth where a rainforest and glacier co-exist in the same town! (Franz Josef)
The second reason why it is so fantastic is the extreme sports they have there - my highlight was going skydiving, which was something I thought I'd never do. Perhaps there's something in the air there that makes you discover your sense of adventure!