Northeastern Turkey.
There is no river at 30 degrees north and 40 degrees east.
China is at 40 degrees north and 90 degrees east.
Antarctica is located 0 degrees north and 40 degrees east.
The North Atlantic
Turkey
The nearest town to 40 North, 30 East is Bozuyuk in Turkey.
That point is in Turkey.
The nearest town to 40 North, 30 East is Bozuyuk in Turkey.
It's in eastern Anatolia, in eastern Turkey.
Albania
Asia
Sea of Japan.