The Dragon Carved Egg, is a perfect crystal egg, the size of a goose egg, etched with images of a pride of dragons. It grants the one holding it immunity from Dragon. This item is another Legacy of Corvus the Mad. In fact, his signature is written in tiny script in the edtchings.
The Crystal Sphere of the Throne is another expensive knick knack kept in the royal jewels by the force of tradition. Unbeknownst to all but the Ruler and the Heir, The Crystal Sphere is an immortal intelligent item giving advice to the Ruler and Heir.
The Grand Sword of the Warlord is a weapon of destiny. It has been wielded by most of the greatest warrior leaders in History. It is their compaion. It is also, unknown to most, a legacy of Corvus the Mad.
The Orb of Corvin is a powerful, though unwieldy, magik item in the hands of a magik user. It allows one to view the world, see where trouble is brewing, and cast spells on the area being viewed as if you were there. Unknown to most, this legacy of Corvus, has its own agenda.
The Dark Eye is an immortal intelligence bound in a mystic staff, a legacy of Corvus. From its hidden place, it influence the world for its own purposes and the purposes of its Dark God.
A little way up the narrow valley, before they reach the woods, the PCs notice the squat, tumbledown buildings by the riverside. They are hardly big enough for a human to stand in, and the complex cogs and shafts that occupy the central cavity of one of the buildings are perplexing. What were these buildings? And how safe are they to explore?
Alternatively a desolate place is the perfect setting for a derelict chapel or croft. There needn't be any actual physical encounter involved, but it adds atmosphere to a place to see its dead history. For instance, in the Outer Hebrides there are whole deserted villages which were razed to the ground by the English during the Clearances. Such stories give a setting authenticity and character.