This is cool: Google mapped and photographed the ruins of ancient Pompeii in Italy. Pompeii was a Roman city that was covered in volcanic ash after nearby Mt. Vesuvius erupted in 79 A.D.
I visited Pompeii in 1997 and was struck by its relatively immense size, and appreciated how big of a disaster the eruption must have been for what was once a thriving little seaside city in the Roman empire.