Excavations of a Viking-era site in Iceland has revealed a previously unknown man-made cave.Archaeologists from the Archaeological Institute of Iceland have been excavating near the small village of Oddi in Rangárvellir, Iceland.Oddi was the seat of the Oddaverjar, a powerful clan in the medieval Icelandic Commonwealth. One of the most famous clan members was Sæmundur the Learned (AD 1056-1133) who wrote the early histories of the Norwegian Kings. The settlement developed into a major centre for culture and learning, with Iceland’s patron saint, Þorlákur Þórhallsson, receiving his education at Oddi from the age of nine (AD 1142-1147).Man-made caves at Oddi...