Nixon's foreign trips achieved more than Obama's, well, everything.
This is not a knock against Obama, but a reflection of the Nixon's achievements -
- ending the Vietnam war in probably the best possible way (after the US tried for over a decade to get the fuck out of there).
- signing the first nuclear arms limitation treaty.
- opening relationship with China.
- facilitating the Geneva conference of 73 and the Agreement on Disengagement between Israel and Egypt, which were the precursor to the peace treaty (Ford kinda screwed it up and delayed the actual peace treaty for a few years).
p.s.
It should be noted that Nixon, like pretty much all American presidents since WW2*, had a horrible, immoral and downright criminal policy in Latin America.
* I can't think of anything bad the Carter administration did down there, but that's about it.