Hidden Sea

Mar Oculto

The Hidden Sea is an inland sea of Essos, closed off north of the Shadow Lands by several mountain ranges that hem it in on all sides, among them the Mountains of the Morn. That enclosure among mountains is thought to be the source of its name.

Two cities sit on its shores: the City of Winged Men to the west and Carcosa to the east.

Chapter 1

A sea closed in by mountains

Books only

North of the Shadow Lands, the land folds into mountain ranges that wrap around an inland body of water: the Hidden Sea. The Mountains of the Morn close it off to the south, and that ring of peaks is said to be where the name comes from — a sea that the mountains hide from the rest of Essos.

Two very different cities sit on its coasts. The City of Winged Men rises on the western shore, and Carcosa occupies the eastern one, mountains and water lying between them.

What we are not sure about

  1. PositionWe worked it out

    The position was inferred from the label on the base map rather than from a symbol of its own: it marks the area, not the point.

  2. Spanish nameWe worked it out

    The Spanish name is the atlas’s own reviewed translation, not the one in the published Gigamesh edition, which does not fix it.

According to the Hielo y Fuego Wiki · Mar Oculto · 2026-07-30

Where each datum comes from
Position
centre of the label on the base map
English name
visual reading of the label
Spanish name
the atlas’s own translation, reviewed
Label on the base map
705
What was read
HIDDEN SEA
Base map
atlas-known-world-2019.png · Adam Whitehead, Atlas of Ice and Fire

Entry written on .