The misty caverns of Fog Canyon are filled with bubbles and acid lakes, with some areas covered in thorns. The ground and walls usually consist of rocks or short green flora. The bubbles in the region have trapped swirling gases inside them, and the ones with an orange glow can explode when they are popped.
In the west part of Fog Canyon near the connection to the Queen's Gardens is the Overgrown Mound where the spell Howling Wraiths can be acquired. The Teacher's Archives are located in the centre of the area which contain the boss Uumuu who is protecting Monomon the Teacher. Quirrel can initially be found outside the building.
Fog Canyon shares many natural geological features with those of Greenpath, suggesting that the areas were not separate in the past. A guard outpost was occupied by Hallownest Crossguards. The Pilgrim's Way, a road starting in the Forgotten Crossroads and ending near the City of Tears, passes through Fog Canyon.
The main feature of the area were the Teacher's Archives, where Monomon the Teacher stored all her research and the kingdom's knowledge. In an attempt to stop the Infection, Monomon became a Dreamer, sleeping for eternity in her archives, protected by the intelligent being Uumuu. At some unknown point, the Archives became a nest for the gelatinous creatures of the canyon.
How to access
The north part of Fog Canyon can be accessed from Greenpath. Access to the east and centre part of Fog Canyon is initially restricted by a Shade Gate, which requires the Shade Cloak to pass through it. This part of Fog Canyon can also be accessed from the Forgotten Crossroads via a hidden passage which can be used with Isma's Tear or a careful Crystal Dash. Lastly, there is an entry into the east of Fog Canyon via the Fungal Wastes, near Leg Eater, requiring Isma's Tear.
Sub-area: Teacher's Archives
The archives of Monomon the Teacher, built in the middle of an acid lake. It contains all of Monomon's research and it is where she sought to store Hallownest's knowledge. The archives are filled with record tablets and preservation chambers, one of which containing the journal entry for the Charged Lumafly. These structures fill the archives with a green glow which is visible from outside. Uumuu is fought here, protecting the resting Monomon.
Sub-area: Overgrown Mound
A Snail Shaman mound near the Queen's Gardens, now overgrown with flora. Squits are present throughout the mound. At the end of the area is the body of the larger cousin of the Snail Shaman in Ancestral Mound, who was not known to be generous but did have a good voice. Near her body is the spell Howling Wraiths.
Millibelle’s Bank can be found near the bottom-most part of the Fog Canyon which is connected to the Queen’s Station.
When approached Millibelle will prompt the Knight with the option to start a bank account where as the Knight pays 100 in order to store a maximum of 4500. Although if 2550 or more Geo is stored Millibelle will disappear the next time the Knight sits at a Bench or uses the Stagway. Afterwards, she can be found in the Pleasure House and can be hit to cause Geo to fall out of her. It should be noted that if the Knight deposits more the 2550 or more Geo Millibelle can never be used to store Geo again.