Toyama, Japan Sister City since 1989:
Located on a delta plain between the Sea of Japan and the towering Southern Japanese Alps, Toyama was completely rebuilt after WW II bombing raids. It is now a thriving modern metropolis and a "City of Medicine".
The "Mountains -- Waterways" connection is that Toyama lies at the base of the towering Southern Japanese Alps.
Pictured above: This brick mural was presented to Durham from Toyama to celebrate the opening of the new Bulls baseball park.