It is thought that the ruins of Qohaito were once the inhabited walls of the ancient town of Koloe, a commercially important place during the good times of the great Aksumite kingdom. Even if it wasn't, the city's impressively large remains are testament to its once-great stature. Though only about 20% of the ruins have been excavated, it'll still take you half a day to pick your way through the digging's main sights.