There are four gates which lead into Seireitei. North, South, East and West. However, they are all protected by a Gatekeeper who are humoungus in size and will not let anyone past unless defeated. The Walls themselves when lowered are made from a special stone that has no effect to reiatsu or physical force at all. The only way in is through the gate. And that is only for Shinigami.But the gatekeeper's themselves are nice and valued to the Spirits that live around the area.
In Rukongai 'Town of Wandering Spirits', the closest of the 80 districts is calm, peaceful and orderly. These spirits are respectful and practically no trouble occurs. Houses are dotted around and these are considered the more wealthier of districts.
District 80 and those around it are completely different from the close districts of 1 and so on. Criminals, thugs and brute force are the main thing you'll find here. Including the odd gambling place too. The poorest living conditions are said to be here and many are spirits are unstable to what they may do. Be careful.
On more of the outskirts of Rukongai in the poorer areas is vast forests and open spaces. Countless forest paths lead around and it is very easy to get lost here...make sure you know your way.