Sorry. I came back days ago but have been too lazy to sit down and write ;_;
I'll do so tonight doe

Vendrello, which is the city that is connected to Trespiano (which is a small town), is a center of commerce and the economy in the world now, and the center of it is the Bovino Headquarters. The Iron Fort, or Vongola Headquarters, is located about an hour or two away from Vendrello, which is where Tsuna and the Guardians currently reside due to their inability to be mobile from the affliction that they suffer from.