Does look like a trip around the world -
That is the major clue of how to put this quilt together!
Half of the squares are made of one fabric cut into a HST - and the other part of the squares look like they were strip pieced and then cut into QSTs - and pieced together into a HST - and then the one piece and strip pieced HSTs were sewn into a square unit.
Lovely quilt pictured.