Travel to or Travel in?
Your choice!
Travel to
Exemple : ‘’I am going to travel to China for two weeks.’’
The difference between "travel to" and "travel in" is fairly subtle and thus leads to confusion. To "travel to" is used when the place is the final destination.
Travel in
Exemple : ‘’I will travel in the United States for a month.’’
To "travel in" is used when the final aim is to travel about within that particular place.