The next town along the C721 is FERRERIES , an appealing little place, no more than a village really. There's little to detain you here, though one definite plus is the Vimpi bar on the plaza at the entrance to town, which serves some of the tastiest tapas on the island. Heading on from Ferreries, you'll find one of the best examples of a naveta - the Naveta d'es Tudons - beside the main road some 6km short of Ciutadella. Seven metres high and fourteen long, the structure is made of massive stone blocks slotted together in a sophisticated dry-stone technique. The narrow entrance leads into a small antechamber, which was once sealed off by a stone slab; beyond lies the main chamber where the bones of the dead were stashed away after the flesh had been removed. Folkloric memories of the navetas ' original purpose survived into modern times, for the Menorcans were loathe to go near these odd-looking and solitary monuments well into the eighteenth century.