Thanks to Google! There seem to be a lot of places in Mexico starting with "X".Honduras
( Sure, "Cali, Columbia"..is a double letter name, too. @jcat
You have some very impressive place names. Especially, that "Xhitey, Mexico". Weather in Xhitey is 24C, ...with a low of 8C at night...from weather dot com.)
Saint Tropez, France