Menzoberranzan (pronounced: /'menzoUb@'ra:nza:n/ MEN-zoh-buh-RAN-zan), the City of Spiders, was a large underground drow city-state in the Upper Northdark. Menzoberranzan was possibly the most well known drow city in Faerun. It was the home of Drizzt Do'Urden, and many of his early adventures dealt with the political intrigue and characters of the city.
You can find more canon information here: http://forgottenrealms.wikia.com/wiki/Menzoberranzan