Ethiopia has so much to offer visitors: the Historic Route, covering the ancient town of Axum, with its amazing carved obelisks, Christian festivals and relics, including the Ark of the Covenant; Gondar, with its castles and palaces; Lalibela, with its remarkable rock-hewn churches; Negash, one of the earliest holy Muslim centres from the Prophet Muhammad Era with the Negash Amedin Mesgid. Lake Tana, source of the Blue Nile, is the largest lake with 37 islands and the Monasteries like Kibran Gebriel and Kidanemhiret dating back to 14th century.