At this place, across a flat broad valley, there has been thrown a huge embankment, constructed chiefly of oblong stones, many of them as big as a sofa, extending in a zig-zag line for several miles.

At some places it rises to the height of thirty or forty feet, and the courses of stone being laid above one another with considerable regularity, this great retaining wall assumes the appearance of a gigantic flight of steps, and being crowned at top by an irregular line of tall trees, it breaks the sky-line beyond the lake in a manner extremely picturesque.

Here and there lateral gaps between the hills occur in the other sides, all of which are filled up with similar embankments.
Near one end of the principal wall we could distinctly trace the ruins of a considerable tower, beneath which the great tunnel or outlet used for tapping the lake most probably passed.

It is said that some early European settlers, a century or two ago, impressed with an idea that treasure was hid in this building, had torn it down to get at the gold beneath..