Labyrinth, a structure of intricate passageways which it is impossible to traverse without a clue. Three labyrinths are mentioned in ancient story. The best authenticated is the labyrinth of Egypt, situated at Arsinoe, near Lake Mceris. Herodotus visited and describes it. It consisted of 3,000 chambers, half of them below ground, the subterranean apartments being sacred burial places. It was extant in Pliny's time. Ruins at the modern village of Howara in Fayoom have been identified by Lepsius with those of the labyrinth. Another structure, on a smaller scale but on the model of that of Egypt, was reported to have been built near Cnossus in Crete, by Daedalus, as a place of confinement for the fabled monster the Minotaur; but antiquaries discover nothing more labyrinthine in that locality than the caves and quarries of Mt. Ida. A third labyrinth was in the isle of Lemnos; remains of it were extant in the time of Pliny, but none can now be traced. A similar structure was said to exist on the island of Samos, and another, called the labyrinthine tomb of Lars Porsena, near Clusium, in Etruria; but no particulars are known of either, and their existence at any time is doubted.