Tor Elyr

Tor Elyr is the capital of Ellyrion, a city built on a series of island castles linked by a web of silver bridges. Each castle is a palace, sculpted from the living rock of a peaked island, decked with statues of Ellyrian princes and their steeds. Beneath Tor Elyr, the waters of the Sea of Dusk churn wrathfully, their foam-flecked tips dashing against the city's alabaster walls. Ellyrians believe that the spirits of their fallen steeds dwell within those waves, and indeed horse-shaped figures rise from the white crests every dawn. Should Tor Elyr ever fall, they say, the spirits of the waves will rise up one last, terrible time to drown the city and all within.

Source

 * Warhammer Armies: High Elves (8th Edition)