So many places to see, so many things to do. If someone dropped 10 million dollars in my lap and said, "Have a great time. Now get out of here."
Studying the history, architecture, art, the flora and fauna, geology, the people, the food, etc. Also, keep in mind that "the dream" would also include no political and religious strife, no wars, and an openness to tourism.
1. The Amazon rainforest
2. Eastern Asia (Japan, China, Cambodia, Singapore, Taiwan, etc)
3. Greenland and Iceland
4. New Zealand and Antarctica
5. Sweden, Norway, and Finland
6. The Middle East (Egypt, Israel, Jordan, Iran, Iraq, Saudi Arabia, Turkey, etc)
7. Italy and Greece
8. Chile, Equador, and Puru
9. Ireland, Scotland, and England
10. South Africa and Madagascar
11. A submarine to the Marianas Trench
12. India
13. Galapagos Islands
14. Easter Island
Just to name a few places. Then, if I could, catch a rocket to outer space.