Wooden pillars puzzle experts in Old Uppsala

Archaeologists working on the site of a railway line in Old Uppsala, Sweden are trying to puzzle out the purpose of two rows of large wooden pillars near a 5th century pre-Viking burial ground and religious center. (photos)

"It is a completely straight line and they have dug postholes every 20 feet (6m)," said archaeologist Lena Beronius-Jorpeland. "They have had an idea of exactly where this line is going and where to build it." The area is thought to have been an important pagan ceremonial site for "blood ceremonies" and religious feasts.