In the Bounty's southeastern waters lies the isle of Thavnair, where tropical coastline soon gives way to dense rainforest─though the intense heat and sweltering humidity remain much the same. The region is known as a rich source of the magically infused stone giantsgall, and the distinctive violet glow from its rocky outcrops lingers in the memories of visitors long after they depart its shores.
— Patch 6.0 special site
Thavnair is a zone in Ilsabard.
Radz-at-Han is the capital of Thavnair. Note that while the game lists Thavnair as part of Ilsabard in the in-game maps for convenience, they are geographically separate (much like how Vylbrand is separated from Aldenard).
To the south of Ilsabard lies a great sea known as the Bounty. The abundance of sea life combined with its central location in relation to the Three Great Continents has historically seen civilizations on the islands of the Bounty thrive, even during the calamitous Umbral Eras.
The most prominent of those civilizations would have to be that of Radz-at-Han, located on Thavnair—the Bounty’s largest landmass. An ancient city-state with a history stretching back thousands of years, Radz-at-Han is best known as the birthplace of modern alchemy. It is interesting to note that, despite having a very limited outward military presence, the city-state has succeeded in forging a non-interference treaty with the Garlean Empire, ensuring their independence while mightier nations fall about them, and as thus, Radz-at-Han remains an active hub for trade between Eorzea. However, it has been noted by some that the treaty was only formed so that Garlemald could obtain items from Eorzea via Thavnair, as official trade between the regions was frozen after the Empire’s failed invasion twenty years past.
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Narunnair
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Formerly little more than a convenient fishing spot, this island became too dangerous to approach after the Telophoroi manifested the Tower of Zot. Fortunately, the Scions were able to banish both the spire and its monstrous inhabitants, returning the location to its previous idyllic state.
— Encyclopaedia Eorzea Volume III, p. 140
Can be seen in the background of the zone but is inaccessible. Contains the physical location of the Tower of Zot prior to completing the dungeon.
This massive rock formation tapers toward a point like a gigantic sword, the weapon represented by its name. One myth states that the Manusya forged a majestic blade to smite their Mrga foes, but when they laid down their armaments in favor of peace, the sword became encased in layers upon layers of stone.
— Encyclopaedia Eorzea Volume III, p. 140
Can be seen in the background of the zone but is normally inaccessible. Only accessible during the patch 6.3 main scenario quest Desires Untold.
Alnair
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An isle off the coast of Thavnair, Alnair has the only harbor with waters deep enough to accommodate the larger ocean-going vessels. Over the years it has thus become the port of call for foreign merchant ships seeking to trade in the city.
— Encyclopaedia Eorzea Volume III, p. 140
Can be seen in the background of the zone but is inaccessible.
For Thavnair Bound
Beyond the Depths of Despair in water at Pavana's Remorse
Steppe Child
Lookout
Mapping the Realm: Thavnair
Free Market Friend: Thavnair
Freebird: Thavnair
Divine Words
Prayers Repeated
Hippo Ridin'
Unbowed
Abalathia's Spine
Gyr Abania
Norvrandt
The Northern Empty
Yok Tural