Waterdeep.
Soran strolled around this strange northern city, wondering if the locals liked fish because there was often a faint fishy smell in the northern city. Amber City was also a city by the river, but there wasn't much of a fishy smell.
Soran could smell the fishy smell in the air as he walked through the streets. Waterdeep was also a transit city in the Frost Kingdom. Because food decayed slowly in the cold climate, most of the meat sources in the north were fish caught from here.
This was a paradise for seafood gourmets. You could buy crabs the size of porcelain bowls with five just Copper Derahls.