The extensive prehistoric flint mining site of Grime's Graves occupïes high ground near the Southern boundary of Norfolk, at a maximum of 100 feet above O.D. It is set amidst wild undulating breck land, here and there densely clothed in bracken, the extensive belts separated by spaces of close cropped turf, or brown heath, conspicuously sprinkled with white patinated flints, a prodigious number of which are flakes of human production.

Many of the hill-tops are crowned by plantations of hardwood and coniferous trees, but there is no evidence that this lonely land of wide expanses was ever more than thinly covered by native timber and one feels that the country as seen to-day is much as the ancient flint miners knew it, thousands of years ago.

Though now so lonely and isolated, for neither high road nor dwelling exists within a mile radius, it was obviously once the centre of great activity, for the total mined area is not less than 34 acres in extent.

Of this, 16½ acres are occupied by 366 cup-shaped hollows, varying from 12 to 70 feet in diameter, all plainly visible on the surface and each denoting an ancient mine shaft. Over the remaining 17½ acres there are no surface indications to suggest the presence of underlying shafts, but excavations during the last four years have definitely established their existence and proved the area to be closely crowded with mine shafts of small diameter.