1. CAPTAIN JAMES COOK
2. XUANZANG
3. SIR RICHARD BURTON
4. IBN BATTUTA
5. CHRISTOPHER COLUMBUS
6. CHARLES DARWIN
7. FRIDTJOF NANSEN
8. YURI GAGARIN
9. MICHAEL PALIN
10. APHRA BEHN
There is no doubt Cook is the greatest of them all. His 3 voyages of discovery are unmatched.
The rest of the top 10 can be argued.
Certainly Michael had it a little easier than the rest.