Far North, in a frigid mining village, a rather rambunctious “ruby” was found. The miners thought they were rich – until the giant ruby sneezed sparks.
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— Dragons: Rise of Berk
In the description for Rubeus, a Groncicle, an unnamed town is mentioned. It is far North and somewhat implied to be very snowy and cold. It is unclear what exactly the inhabitants mine, though Rubeus is mistaken for a Ruby.
This Rockstomper's tracking skills came in handy when Snotlout and Hookfang crash landed on its island. Moldruffle found them fresh water deep underground by using its horns as a divining rod.
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— Dragons: Rise of Berk
The resident Moldruffle dragon assisted Hookfang and Snotlout finding water on this island after they crashed there. The Moldruffle 'divined' water under the ground using its forked horns. This implies that this island has no fresh water at its surface.
The Obskewer is rarely seen. This is because he spends all day in an Obscurory; a dank cave that serves at the Obskewer's home. He only emerges at night, and is the color of the night sky, and so is rarely spotted as he hunts for his nightly food. You can, however, find his territory with relative ease, as he has a habit of impaling prey on thorn bushes to serve as meals for his little shadows.
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— Dragons: Rise of Berk
In the description of Obskewer, a Small Shadow Wing, a cave called the Obscurory is mentioned. It is described as a dank cave that Obskewer spends the entire day within, only emerging at night. Thorn bushes grow outside of the cave, which Obskewer uses to impale his prey on their thorns to store them for later consumption by his offspring.
This location in the game, School of Dragons, is popularly known as 'Credit Island', as credits for the game are scrolled on a board here. It can be accessed in game through the Settings screen. This location, from very early on in the game's existence, was promising to be a special location, but this has never materialized so far.
The island itself is barren reddish rock, and appears to be a caldera of some sort. There is a mist, fog, or smoke filling the caldera itself, and has mysterious wooden gears rising from it.
In the game, School of Dragons, there are activities called "Stable Quests" that the player can send their dragons on. These quests are meant for the dragons the player has housed in their stables, i.e. not currently active. One Quest, titled "Lurking at the Island", involves an old, shrouded, unnamed island which might have something dangerous there. The fog there is described as "burning". Titan Monstrous Nightmares or sonic dragons (for example, the Thunderdrum) are recommended to send on this Quest to maximize success. The Quest has maximum difficulty and takes a total of 16 hours (from School of Dragons, where the player's Stables are located.
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Investigate reports of something dangerous lurking at an ancient, foggy island
In the game, School of Dragons there are activities called "Stable Quests" that the player can send their dragons on. These quests are meant for the dragons the player has housed in their stables, i.e. not currently active. In the Stable Quest called "Field Trip", Phlegma takes children to a nearby island to look at its plants and animals. A multi-headed dragon is needed for best success. The island is unnamed. The quest takes 24 hours.
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Phlegma is taking her students on a field trip to a nearby island to study the flora and fauna.
In the game, School of Dragons, there are Northern Lights (or Aurora Borealis) near Icestorm Island. If the player flies toward the Northern Lights, they will end up on a small glacier directly in front of the light phenomenon. There is also a sea fishing spot, which can only be fished from the back of a Gronckle and with the Deep sea fishing pole.
In the game, School of Dragons, Snotlout mentions a "Secret Training Island" during the player Quest "New Student". He has the mineral Sylvite, which he gives to the player to experiment with at the Alchemist's lab. The island itself is not seen or described further.
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'Sup? I'm Snotlout master of awesome. Hookfang and I found this sylvite at our secret training island! Cool, huh? It's really rare but I'll let you have it for your experiment. Just remember, you couldn't have done this without me!
In School of Dragons "Rise of Stormheart" Expansion[]
This unnamed location appears in the School of Dragons Expansion, "Rise of Stormheart". It is a small barren island on the surface, but underneath and around it in the sea it supports fish, coral, and seaweed. The player is able to swim below the surface and find a cave with air. The cave appears to be buttressed with a spine of a large creature. There is a wrecked ship inside as well. Nikora Stormheart uses this secret cave to stash a crate of Grimora venom, as well as crates of other items.
During the 2022 Summarhildr event, the player is asked by Fishlegs to fly away from Mudraker Island during a bad storm in the quest "Kick the Nadder's Nest". The player ends up on a small beach surround by a few short Sea Stacks. There, the player bonds with Wartooth, a Gruesome Goregripper, and fends off a pack of Skrills before being rescued by Fishlegs.
In the game, School of Dragons, there are activities called "Stable Quests" that the player can send their dragons on. These quests are meant for the dragons the player has housed in their stables, i.e. not currently active. During a Quest, the player is provided a "log" of what their dragon(s) are doing. One entry is "Exploring an island for a place to make a bed for the night ...". This may be followed by another entry indicating the presence of other dragons on the island - "Unidentified wild dragons on the island below ...".
This unnamed location appears to be a volcanic cavern system on an island to the east of Berk. During the game, the Dragon Riders are persued by the armored dragons of Drago's Army. The Riders find the lair of Drago's Bewilderbeast, and the player - playing as a rider/dragon pair - must free armored dragons and ultimately defeat the Bewilderbeast.
In the description of the SkrillknapperSunspark, the Hymir Tribe is mentioned to live on "islands to the North-West". This is presumably to the North West of Berk.
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To the Hymir Tribe in islands to the North-West, the story has a particular significance. They claim to have seen the unexpected result of this battle. [Battle between Thor and the World Serpent]
In the frozen mountains in the North East of the Archipelago, nestled somewhere between Valka’s Mountain and Glacier Island, there is a small mountain range that is the ancestral home of the Ice-Tongue Quaken. This region is not often visited by the Vikings of Berk; partially because it is quite remote, and partially because it is dangerously prone to avalanches.
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— Dragons: Titan Uprising
This island is remote and covered in snow, and is known for its abundant avalanches. The avalanches are caused by Ice-Tongue Quakens who live on the island, who view it as a playful activity. According to Dragons: Titan Uprising, these Frozen Mountains are located to the North East of Berk, in between Valka's Mountain and Glacier Island.
