Talsyn

Talsyn, the Grove of Eternity, is a realm of Athel Loren, ruled by Lord Araloth the Bold. It is the largest and most prosperous of all Athel Loren’s high realms, and its warriors have ever formed the backbone of its armies. Other lords and ladies of the great council are resentful of this status, claiming it arises not from merit, but because both the King's Glade and the Oak of Ages lie within the Groves of Eternity. Perhaps there is as much truth as jealously in this sentiment, but whilst many envy Lord Araloth for his prestige, few desire his burdens.

Nowhere in Athel Loren is there a stronger bond between Elves and forest spirits as there is in the Groves of Eternity. This was the part of the forest that the Elder Treeman Adanhu claimed as his own, and since his passing, the other spirits have steadfastly honoured his vision of coexistence.

Not that the Dryads can be said to be friendly exactly, but they at least refrain from the kidnapping of Elf children that is so rife in other parts of Athel Loren. It is in Talsyn that the nexus of worldroots can be found. When the world was young, the spirits of Athel Loren travelled these living pathways to the forests of distant lands. Alas, many of those routes are now closed, either because the worldroots themselves have been sundered, or because the forests at the far end have been consumed by the hungry forges of barbarous races. Nonetheless, the Wood Elves can still use the worldroots to reach lands as distant as chill Naggaroth if there is sufficient need.

Source

 * Warhammer Armies: Wood Elves (8th Edition) -- pg. 10