Turkana
toronto
There are only two countries that begin with 'tur', one is Turkmenistan, which is considered to be in Asia; and Turkey, considered to be Eurasian. Perhaps you were thinking of Tunisia in northernmost Africa.
One vegetable that starts with "tur" is turnip.
Turbine.
Turku
Turin
That would be Turku
turquoise
"Turn" as is turn the wheel.
turquoise
turkey