The boys grew up within sight of the sea that took them away, rambling along paths and climbing rocks that would later be the launching pad for their flimsy rafts.The Mediterranean has been robbing Tunisia of its young, who abandon their homeland in hopes of a better life in Europe. At the closest points, Ras Jebel in the north and the Kerkennah Islands in the east, it's a half-day sail if all goes well.But the sea often swallows the rafts whole, and their passengers disappear without a trace.Migrants who go missing are a daily reproach to political failure, so there is rarely an official count of the departed, the dead or the disappeared. However, an Associated Press tally has documented at least 56 800 migrants dead or missing worldwide since 2014 - almost double the number found in the world's only official attempt to count them, by the UN's International Organisation for Migration.This includes the 11 young Tunisians who disappeared off the coast on May 7, 2011, and were never counted by their government. They left behind parents and siblings, who on a clear day can see the island where the boat crashed against the rocks and sank. Their photos, school notebooks and clothing for the most part remain untouched in their rooms. In case they return.Often the tides of the Mediterranean bring ashore instead the bodies and belongings of others who attempted a similar migration - those from distant countries who hoped that the beaches of North Africa would be their last stop before Europe. These migrants have already traveled thousands of kilometres just to reach the Mediterranean coast, where their journey stops abruptly.The belongings are painstakingly gathered by an artist who tries to create beauty out of sorrow - a torn pink bra, a child's worn jacket, a pack of cigarettes. And the bodies are retrieved by a retired fisherman, who has made it his life's work to provide a proper burial to the foreigners even though they die without a name."Europe is protecting its borders but has no interest in the human beings," said Chamsedding Marzouk, the former sailor who maintains the cemetery of the unknown as a volunteer. "Who will visit the graves of our relatives when they die? Who will visit these graves? Who will weep for them?"* Sign up to News24's top Africa news in your inbox: SUBSCRIBE TO THE HELLO AFRICA NEWSLETTERFOLLOW News24 Africa on Twitter and Facebook.