I was wondering how many people do many overland crossings between countries? On many of my trips I usually open jaw into one country and out of another. This can include rail, road, ferry or by foot connections.
1. usa-canada & v.v. (car)
2. usa-mexico & v.v. (foot)
3. honduras-el salvador & v.v. (bus,tuk-tuk)
4. honduras-nicaragua (bicycle)
5. peru-bolivia (bus)
6. bolivia-chile (bus)
7. chile-argentina (bus)
8. argentina-uruguay & v.v. (ferry)
9. argentina-brazil (car)
10. guyana-suriname (ferry)
11. suriname-french guiana (ferry)
12. south africa-botswana (overland truck)
13. south africa-zimbabwe (overland truck)
14. mozambique-south africa (overland truck)
15. botswana-namibia (boat)
16. botswana-zimbabwe (overland truck)
17. zimbabwe-zambia & v.v. (overland truck)
18. zambia-malawi (overland truck)
19. malawi-mozambique (overland truck)
20. malawi-tanzania (overland truck)
21. tanzania-kenya (overland truck)
22. spain (melilla)-morocco & v.v. (taxi)
23. uk-france & v.v. (ferry)
24. belgium-france (car)
25. france-luxemburg (car)
26. france-monaco & v.v. (train)
27. luxemburg-germany (car)
28. switzerland-germany & v.v. (car)
29. switzerland-liechtenstein & v.v. (car)
30. liechtenstein-austria & v.v. (car)
31. switzerland-italy & v.v. (car)
32. italy-san marino & v.v. (car)
33. italy-vatican city & v.v. (foot)
34. lithuania-latvia (car)
35. norway-sweden (train)
36. sweden-denmark (train)
37. sweden-finland (aland islands) & v.v. (ferry)
38. uae-oman & v.v. (car)
39. azerbaijan-georgia (train)
40. georgia-armenia & v.v. (bus, taxi)
41. thailand-myanmar & v.v. (boat)
42. singapore-malaysia & v.v. (bus)
43. singapore-indonesia & v.v. (ferry)
44. hong kong-macau & v.v. (ferry)
45. north korea-china (train)
I'm generally a bit lazy when it comes to travel - if I can fly, I will! 
