Granzam (グランザム,Guranzamu?) is the main settlement of the 55th Floor of Aincrad and the city where the Headquarters of the Knights of the Blood is located. Granzam is home to a large number of blacksmiths, so the player population is rather high.
Granzam is also known as the Steel City, because of it being mostly composed of huge towers made from black steel. However, it is noted for its lack of greenery, trees, and flora. The weather is generally very cold, and it is particularly unforgiving in harsh winter winds. The road is made of steel plates locked into position with rivets.
As the city is where the KoB headquarters is located, Asuna comes to this city often. On the other hand, after the 55th Floor is cleared, Kirito is first seen in this city when Heathcliff denies Asuna's request for a temporary leave. Kirito then comes to this city to visit the KoB leader to get him to accept her request, but ends up agreeing to duel him. After becoming a member of the KoB, he comes to the city to report for duty at the KoB headquarters, but after the incident with Kuradeel, takes a break from the guild and only comes back to the city 2 weeks later, when Heathcliff requests their help with the 75th Floor's boss.
When the game is cleared, Kirito and Asuna watch «Granzam» crumble into the clouds along with the other floors.