Dar es Salaam is certainly not at the top of the list of places to see for most visitors to Tanzania. It's often a necessary stop on their way to Zanzibar, the northern safari circuit or home. That being said, Dar has its charm. Walks around the city center are a great way to get a feel for the culture and Kariakoo market can be an interesting place for the more adventurous. It can also be a good base for visiting some of the nearby sites such as Bagamoyo, Bongoyo and Mbudja Islands, as well as learn to scuba dive or go deep sea fishing. For those looking for something more humanitarian, most international organizations are based in Dar and may be a good starting point if you wish to volunteer. http://wikitravel.org/en/Dar es Salaam