I was in Israel in March, 2005 doing some GPR experiments on a number of archaeological sites.  This was all done with archaeologists from the University of Haifa. This is a map of all the sites I tested with GPR:

Here are some of the results:

Tel Dor, a large coastal tel south of Haifa has an occupational history going back to at least the Bronze Age.  We were interested in whether we could see some Roman walls that were projecting into an unexcavated part of the site from some trenches.

Here is one of the profiles from this tel.  A robbers trench (possibly Crusader in age?) can be seen going down to the top of what is left of the Roman wall.

These walls, and the robber's trenches can be seen on the slice maps:

At the Hippos site, on the western side of the Golan Heights, there are Hellenistic features, much Roman architecture, and then abundant re-use of the site up through Byzantine times (and even later). Here I am collecting 400 MHz data through the floor of a Hellenistic courtyard to see if there were older features that it was built on (of course, there were!).

in this profile can be seen older foundations and floors beneath the present stone pavement:

At Hippos we also looked along road to see if there were features projecting from the excavations into areas to the northeast of the Roman part of the site.

Walls and floors of unknown age architecture all over the place!

The most fun was collecting data on the beach, and nearby sand dunes in the Tel Dor and at Neve-Yam. 

What great data!  We could see many buried walls and other features, as you can see in this profile.  I suspect there is a huge amount of archaeological material under these beaches and dunes!  Notice how if you get too close to the salt water on the beach, the reflections are totally attenuated: