London's "lost stream" yields treasures.

Beneath the streets of London runs a river of gold - not actual gold and not actually a river, but archaeological gold in the form of the "lost" Walbrook River. Dubbed "the Pompeii of the north," the thick layer of mud has been a treasure trove of Roman artifacts, from a gladiator’s amber amulet to entire buildings. (photos and video)

Located at the future site of the new Bloomberg offices, the dig has already yielded over 10,000 artifacts dating to the first four centuries of Roman occupation. Archaeologist Sophie Jackson from the Museum of London, which is conducting the excavations, said, "The waterlogged conditions left by the Walbrook Stream have given us layer upon layer of Roman timber buildings, fences and yards, all beautifully preserved and containing amazing personal items, clothes and even documents – all of which will transform our understanding of the people of Roman London."