Herculaneum : looking down on what used to be the sea front. The arched openings were used for boat storage and warehousing.
They found c.300 skeletons here: not unreasonably the people thought they could escape the pyroclastic cloud here. You can see on the left, though, how deep it became - about 52ft., and it extended the coast out by some 440 yds, so they didn't have any chance of sheltering.
The modern town of Ercolano was built on top of part of the ancient city, and can be seen in the background. They would have to demolish houses to excavate the remaining hidden parts.

This set of images © John Woodhouse, 2006