Still haven't listened to all the previous recommendations but I happend to come across:
Roda-Viva by Chico Buarque de Hollanda (
lyrics)
There is a good instumental verison by
Kittinfish Mountain.
The lyrics remind me a bit of The Circle Game by Joni Mitchell, although the
Buffy Sainte-Marie version is closer to how I learned it in song circle (it is in Rise Up Singing, likely the most popular songbook in the US).
And speaking of Buffy Sainte-Marie, I've been meaning to mention Holcombe Waller's wonderful cover of
Qu'Appelle Valley, Saskatchewan (
video).
Checking to make sure I hadn't posted it before, I found a old mention of
Buffy Sainte-Marie - It's my Way that is also really good.