Roman City Rediscovered

Altinum, an important coastal trading city in the Roman empire, and a predecessor to Venice, has been (re)discovered, using filtered aerial imagery.
I imagine archaeologists will descend on these agricultural fields like a plague of locusts, but stick around quite a bit longer. Story from Der Spiegel, image above from the accompanying photo gallery. Followup: More at NatGeo, with a better side-by-side comparison of the imagery with the conjectured structures and features of the city.