best dangerous place is a abandoned skyscraper in the middle of Yaoundé On the brink of collapse, with a such a history of violence, devil-worshipping activities and a hidout for mobsters, even the Yaoundeze were really afraid of going in there. (had to bribe the guard). It history  betrays it must have been once a regular killzone and even nowadays it has a rather bad reputation and a lot of bats.