Manyikeni and Chibuene are two archeological sites occupied from around 600 to 1700. Chibuye was initially a farming community on the coast, before becoming a trading station linking southern Africa and the Indian Ocean. Manjikeni was a town marked by stone enclosure similar but much smaller than those of the Great Zimbabwe site.
Full screen map of Manyikeni and Chibuene (On tentative list - Mozambique)
I went to Manyikeni earlier this year with my wife. I've been to Great Zimbabwe and was well prepared for this to be a lot less....and indeed it was. There is a groundkeeper who lives in the one room museum and if you can't speak Portuguese he won't be much help. Having said that, if you use your imagination a little the site is an interesting stop. Best to do a little research before going as there is not much there. Best website I found was: www.mozaictravel.net/?p=646 it contains information, and the best map and directions.