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Underground spots on Deer Isle are some of the strongest base locations in DayZ: caves, sealed bunkers and sewer mazes that are hard to find and even harder to raid. This guide ranks the ten best, with how many players each fits, how many entrances you have to fortify, and which towns keep you supplied.
Locations are ordered roughly from biggest to most situational. Capacity, entrance count and nearby supply are the three things that decide whether a spot works for your group.
Map pins are approximate, anchored to the nearest named place - the source gives no exact coordinates.
The single largest underground space on the map - a full cave system that comfortably holds a large team and a lot of storage. It only has two entrances, and one of them is a drop from above where most players who do not know it simply fall to their death, which doubles as a passive defence.
Resupply is excellent: Waldeboro town sits less than a kilometre away with a plank pile for building, and the eastern military zones (Bayville, East Arbor, Area 42) keep the gear flowing.
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Sitting in the centre of the map next to the blue-door metal building, this bunker has a single entrance, which makes it one of the easiest spots to fully fortify - one well-built wall and you are sealed in.
Central position means you are never far from anything, and the nearby church loot run is about two kilometres out.
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Directly under the power plant runs a sewer maze: two tunnels, each with two entrances. The labyrinth layout makes it genuinely easy to hide a stash where raiders will never look.
Sandy Bay is under a kilometre away for building materials, and the church nearby covers military loot.
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A big cave with a single entrance, which means you do not even need to build walls - a couple of doors make it almost raid-proof. Ideal for a medium-to-large group that wants minimal building effort.
Camp Beer and Camp Eagle nearby keep the loot topped up.
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A smaller companion to the northern cave, best suited to solos and duos but still fully fortifiable thanks to its single entrance.
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On the western side of the map, this single-entrance bunker is a solid solo or duo home. The church loot entrance is around 1.5 km away, and Old Town itself is close for everything else.
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A hidden cave inside the military complex with a lot of room for storage - large tents and car tents fit comfortably. One entrance, isolated up in the mountains, so traffic is low and the spot stays quiet.
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The second-largest underground space on the map, and it can be closed off with a single door or gate - exceptional for a large group that wants security with minimal building.
It is isolated and well hidden. As a bonus, the Baron Falls waterfall above makes a dramatic sniper vantage point over the canyon.
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Well hidden and crucially off the usual loot path, so very few players ever stumble onto it. The complex has many internal doors, but a single one is enough to lock it down. Works for any group size.
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A roomy underground space under the Georgetown school, lockable with a single door and big enough for a large group. Paris Island and Georgetown are both close for loot and building.
Show on mapA staircase leads down into a prison building where the cells can be locked - against enemies, if you want to trap them. There are two entrances, one of which is a secret escape route. Airfield, Georgetown and Warren Cove are all within two kilometres.
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Open the interactive Deer Isle map to line up these underground locations with nearby loot and travel routes.
Open Deer Isle map ›Waldeboro Cave is the largest underground space on the map and the strongest pick for a large team. Baron Falls Secret Cave is the second largest and can be sealed with a single gate.
The Oceanville southern cave and the Old Town bunker are both single-entrance spots that solos and duos can fully fortify with minimal building.
Yes, several bunkers have a ladder down that damages your hands without gloves. Carry a pair before descending.
Single-entrance caves and bunkers are very hard to raid because you only have one point to defend. They are not impossible to breach, but they massively reduce your exposure compared with surface bases.