Aerowalk (the Hub) is a very popular oldschool Duel map. It was originally created for Quake 1 by Preacher. Aerowalk was added to Quake Live with the Premium Pak 1.
Aerowalk is a semi-medium sized Duel map, with 5 portals, so it's very easy to get around the map fast. Mega Health is located in the center of the map, near to Green Armor and a Rocket Launcher . Red Armor is in one corner of the map on a ledge, where you need to rocket jump or circle jump.