Baldur's Gate

Baldur's Gate, also called The Gate, is a major port located where the Chionthar River empties into the Sea of Swords. Lying on the Coast Way between Amn and Athklata, while also receiving river traffic from the east and boasting a large natural harbor, Baldur's Gate could never be anything other than a major trading city. 
With the harbor as its focal point, the city grew around it in the shape of a crescent moon. Nowadays the city has expanded beyond that form, and is divided between the bustling Lower City overlooking the harbor and the Upper City, where the city watch does their best to keep the riffraff down in the lower city where they belong. 
Even the most hardened adventurers watch their steps in Baldur's Gate, where lives hold prices in copper and greed proves deadlier than dragon fire. Baldur's Gate has a reputation for being a rough place, where crime and opportunity walk hand in hand, and where anything can be bought, sold, or seized at swordpoint. If something can be given a price, it's for sale somewhere in Baldur's Gate. Drugs and poisons sit on shelves alongside tinctures and remedies. Trade goods from Chult, mechancial wonders from Neverwinter, tomes of magic from Calimshan, and the most believable counterfeits of each can all be found in the city's stalls.