Archaeologists have been investigating human bones found near the ruins of a bridge in the Three Lakes region of Switzerland. They seek not only to discover what took place, but also to better understand the Celtic heritage of the region. Archaeologists have been investigating human bones found near the ruins of a bridge in the Three Lakes region of Switzerland. They seek not only to discover what took place, but also to better understand the Celtic heritage of the region. Archaeology Phys.org – latest science and technology news stories