Ho Chi Minh City

 Saigon, currently better known as Ho Chi Minh City, is the largest city in Vietnam.

User Worldhitch mentioned that in Saigon you won't have the feeling to be out of the city for a very long time... But don't panic!

Towards Hanoi
There's 2 main roads: AH1, super busy road along the coast, crowded and in good shape. Ho Chi Minh highway, going through the highlands, more scenic, some parts have very light traffic or bad roads.

Towards Cambodia
Take a bus to Ben Xe An Suong. This is a huge bus station, so there are about 15 lines from somewhere in the centre going there. Walk out of the bus station and you will stand right on the motorway that leads straight to the border.

isin: Vietnam