Rhiannon

Rhiannon -- A city of the planet Boadicea. Rhiannon lay below the level of the sea. It had been low to the sea when it was founded, and in the thousands of years that had passed, had gradually sunk lower and lower, until a seawall became a necessity. it was the first city to feel the effects of the Aurelian gravity drives when they began their invasion. The city was battered by tidal waves. - (Worlds Apart Book 03 - Boadicea)