Here you can observe many birds such as white pelican, saddle bill, yellow bill, storks and kingfishers. Also hippo's can be seen. A boat can be rented to visit one or more of the islands with their monasteries. Debre Sion is the most famous. It is said that in the 9th century A.D., the Ark of the Covenant was brought here from Axum because it was in danger to be destructed by the ferocious queen Gudit. Indeed, the oldest written document about Axum has been discovered here. And the inhabitants of the island are Tigrigna (the lanquage of the North) speaking people.