The Isle of Bratislava (Oceana: That Wodate Oster) was one of the three islands off shore near Hurbanova, Oceana. Together with the Isle of London and Isle of Frisco, it formed the City Archipelago. It had been the only inhabited island, until it sank after the 1903 earthquake which caused heavy floods. All people survived the earthquake, but the island was once transformed into a mudflat. The Oceana people call this nowadays That Wodate Oster, the wet island. Nowadays, none of the isles is inhabited.