The Avid Horizon

"This is the end."

"Two vast winged shapes guard a gate of something like resin, smooth but uneven. It is deep gant - the colour that remains when all other colours have been eaten. Ice crusts over the crack between its valves. Approach, and your breath freezes, falls tinkling in shards from the air. It would be utterly foolish to touch the thing.

A merciless wind blows from everywhere to everywhere. It passes without effort through your bridge-coat, your flesh, your lungs. The dock lies empty."

Brrrrrr. Art from Sunless Sea.

Avid Horizon is the northernmost known place in the Unterzee. It's bitter cold there. Nobody's gone further. Dozens have died trying. Zailors, of course, are advised not to go.

One of the docks there offers those who have been exiled from London a chance to beg for forgiveness, but they must be willing to sacrifice everything, and there is no guarantee the Admiralty will choose to accept the apology.

The realm of the Judgements (for example, the Sun) apparently lies beyond the gate. Passing through said gate strips a traveler of their body, and they must somehow forge a new one while inside.