The only map location in The Grid is a Workshop Complex which has nothing in it. For more information about this check out the wiki page. Headshot and Ray are the 2 main unique recruits here but you can also find various other unique recruits which don't always have the same names. Slave Markets: The Slave Markets in South Wetlands is home to multiple unique recruits. Clearing this will trigger a world event and cause less Swamp Ninjas to spawn Shade, the leader of the Swamp Ninja Faction can also be found here - he has a 20,000 Bounty on his head and a Guardless Katana which is typically Edge Type 1 - 3. Swamp Ninja Hideout: The Swamp Ninja Hideout is home of the Swamp Ninjas Faction which patrols much of The Swamp. There will not be much loot for you to scavenge from inside the base but you can find a Horse Chopper (Meitou Quality) that drops off of the Red Sabre Boss. Red Sabre Hideout: As the name Red Sabre Hideout suggests this is the home base of the Red Sabre Faction. However the wiki says it does have a chance to spawn Ancient Science Books so maybe you will get lucky! Infested Lab: Infested Lab typically does not have much notable loot, on a couple of my playthrough's all I found that is worth mentioning is 2 Guardless Katana a Skeleton Repair Kit & other random materials. On my last play through I got a total of 8 Ancient Science Books here! Blood Spiders are typically found guarding this base but they will often fight other enemies passing by giving you an opportunity to take them out while weakened. Swamped Lab: The Swamped Lab to the southwest of Shark is one of the best early locations to hit early on in the game for some Ancient Science Books and various other items. Keep in mind too that enemies always travel in packs of at least 5 or more so you're going to need more than one or two powerful characters. It's a crude way of gauging your strength against an enemies and it's not always reliable but it's helpful if you have no other way of knowing what an enemy is capable of. You usually want at least the same amount of Toughness as your enemies if not more.

Since there are no levels in this game the only way we can gauge our character's strength is through their stats Toughness is arguably the most important one for gauging what you can handle. If the zone requires you to have at least 10 characters with stats 35+ to survive there then I would consider it to be a mid game zone. This page contains a list of all the zones in Kenshi that I would consider to be mid game zones. Mid Game Zones Loot Guides & Map Locations - Kenshi

Kenshi map complete