You might consider Google maps.
If you want to draw it yourself, use Adobe Illustrator.
Here Tony Harmer shows you how to draw a simple map:
There are plenty of other tutorials if this doesn't do it.
Your question is rather broad-brush and needs clarifying. Do you want to create the map yourself, do you have the skills?
Do you want/need to have a map of a specific area, do you have the budget to commission one?
Would your needs be met by an agency such as Shutterstock or Adobe stock?
I hope your issue has been resolved till now. If not, please let us know so that we can assist you further.
Else please confirm if any of the suggestions above helped.