Eastern Province (Saudi Arabia)
The three main cities of the Eastern Province are all tightly clustered together and no more than a 15-min drive apart from each other.
The rest are scattered around the coast:
You need to talk Arabic or English
Public transport is very limited, so having your own wheels will really pay off here.
Best to ask your hotel or colleagues and have a regular taxi where you know and can trust driver.
You can find all kinds of cuisine here. You find a lot of Indian and pakistani restaurants. Finding standalone Vegetarian restaurants is just too impossible.
Carry your passport/work permit all the time. You can asked to produce your documents any time of the days and night. Do not point your camera at a lady. Do not carry alcohol/drugs into Saudi Arabia. Avoid carrying medicines unless you have a prescription along with it. Do not carry any pornographic material with you.