vietnam travel tips?

[M2d]

i have to go to ho chi min city in a couple of weeks for work. we'll (group of four co workers) be there from monday until friday morning, but only working tuesday and wednesday nights. what is there to do during the day/other down time?

i'm not a huge history buff, but i guess any war memorials/museums should be checked out. all i know about vietnam is that the bbq pork sandwiches and noodle soups are awesome and that jimmy cliff got a letter from a friend who was fighting there.