In southern Portugal, a group of passionate divers has deliberately sunk four large marine vessels, not only to enhance the diving experience but also to foster new habitats for marine life.
On December 14th, 1991, the passenger ship Salem Express sank when a storm hit the Red Sea. The shipwreck was a human tragedy. Among the passengers were hundreds of pilgrims who were on their way home from Mecca.
The Baltic Sea is famous for its ability to preserve old wrecks. But along the West Coast there are many wrecks that have never been properly investigated, according to Staffan von Arbin, who researches the subject at the University of Gothenburg. "Each ship brings a new piece of the puzzle to history, so we can paint an even better picture of how society used to work," he said
