It is surrounded by deep moats that protected the walls.

All of this was set within massive stone walls and surrounded by deep moats.

Outside the curtain wall was a deep moat which filled with sea water at high tide.

The castle has a deep moat that isolated it from the rest of the hill on the West.

The small town, however, was heavily fortified and had a deep moat.

It was surrounded by a deep moat, which has now been drained.

The tower stood on a small hill surrounded by a deep moat.

The building is surrounded by a deep moat, which was permanently filled with water.

The researchers have also found evidence of a deep moat with the town wall.

The east, south and north sides are surrounded by a deep, wide moat.