 The Turtle Tower ("Tháp Rùa") standing on a small island near the centre of the lake is linked to the legend.The first name of Hoàn Kiếm lake is Tả Vọng, when the King hadn't given the Magical Sword back to the Golden Turtle God (Cụ Rùa).Large soft-shell turtles, either of the species "Rafetus swinhoei" or a separate species named "Rafetus leloi" in honor of the emperor, had been sighted in the lake for many years.