I love travelling, so that's an extremely hard question to answer.
If I were to do it for scientific wonder? Gobekli Tepe in Turkey, which right now is leaving scientists baffled and could disrupt the whole idea we had of how long humanity has actually been on this planet.
For culture, probably Nepal. I had the amazing opportunity to visit Samye Ling, the Buddhist temple in southern Scotland about two years back. I've never been to somewhere more peaceful.
And for experience, probably Cuba. They're amazing people, with wonderful rum and cigars. Great beaches and a fair government. The place looks brilliant.