If you're looking for a ragged, end-of-the-earth place - go to Berbera. This old Red Sea port has dusty streets, crumbling architecture & wrecked ships.
The self-proclaimed Republic of Somaliland is safe to travel. And while there's not much in the way of tourist sights, Hargeisa is the gateway to Somaliland.
Discovered in 2005 and yet 5000 years old, Las Geel is one of the world's greatest prehistoric art sites.