Abducted is the normal dungeon of the Bridge expedition and is the second dungeon in Africa. It is a lot easier than Temple of Perdition so if you are good geared you might be able to come here at level 25-26 and be able to complete it. Look for Uróthiens items or Rayols in the Auction House. They are really high in damage and if you keep your Mercenary to the highest possible level, you will have no problem farming this dungeon.
Africa dungeons start at level 20 and are essential to the game. You will find incredible monsters and bosses here.
Chamber of Pyro is the third dungeon in Africa. Very interesting dungeon and very long. It is based on luck so you could spend all your dungeon point easily before reaching the boss.
Fairground is the first of the high level dungeons in Africa. It is available at level 80 but don't be fooled. The leader of the mighty Umpokta is a formidable boss. You need to be highly geared to face him. A good preparation for him is if you are able to beat Zagrash in Zagrash's Fort. If you beat Zagrash most of the times, you might be able to land some kills on Papa Sasama. Generally, he is an extremely hard boss and you will be waiting for 86 to skip this dungeon and move to the next one. Read the Zagrash guide and how to gear up to beat him. Same tactic applies for Papa Sasama but with even higher levels and stats.
In the Heart of Decay is an important dungeon because it will gear you up for the serious dungeons that await you on the higher levels. Gaius, Lucius and Antonius item level 100+ start to drop so you could expect to change your weapon and some parts of your armor here. Next dungeon is pretty hard so you will need to stay here for as long as it's necessary.
This is the Lost Harbour dungeon. Long one with something like two bosses. Last dungeon before you depart for Germania. Also this is where you can start to find Purple drops from the boss more often and in higher chances.
Sasama`s last journey is the highest level dungeon in Africa and it will get you ready to depart to Germania for good. The story behind the dungeon is that in the previous lower level dungeon you have defeated the tribal lord Papa Sasama but something is happening in the village even after his death. You come back to investigate. Just 2 levels after In the Heart of Decay, you need to be very prepared to come here. Item level drops are slightly higher so you might want to fight through the dungeon and reset the dungeon before the boss and start over until you gear up to face him. You will stay here for a long time as the next dungeon is far away. The last minions are also very tough. You could be farming the boss easily and still sometimes loose against Voodoo Warrior or Spear Guard. Here is an example of a very good setup that still lost to Spear Guard. It's just that Spear Guard can critical hit very bad and killing your tank in 2 rounds and that's how you loose.
Temple of Perdition is the first African dungeon. Entry level is 20 but you have to be really well prepared before coming over here. Extremely well geared you might be able to get through to the boss but killing him would require a lot more. I would suggest coming here in your 25th Level and really well geared or on level 20 but to farm until the boss and then reset. Minions are still good source of experience and items. Try searching for Rayols or Uróthiens items in the Auction House, they are really high in damage.
Under a Blood-red Sky is the Advanced dungeon of Abducted. The boss' drop is well over the 100 item level so be prepared for some sweet loot. Also, this dungeon is a huge relief after the struggles with Fairground.