The Chronicles of Avorai
The city of Silver Falls sits on top of the sheer cliff where the Silver River flows over, thus giving the city its name. The river itself divides around the city creating a natural moat on the north, south and east sides of the city, with protection on the west provided by the cliff face.
Originally the only thing standing on this spot was what is now the Royal palace. After the invasion by the (ink is blurred here) which united the kingdom 300 years ago, this spot was chosen as the capital due to its natural defenses and its ideal location within the kingdom. The central districts around the city were built soon after.