Location from My Little Pony: Friendship Is Magic by Hasbro / Lauren Faust
A crystalline tree-castle that grew from the spot where the Golden Oak Library stood — Twilight's home and Equestria's friendship command center.
The castle is simultaneously grand and homey — Twilight has filled the crystal halls with books, rugs, and personal touches that fight against the intimidating architecture. It smells like old parchment and Spike's gem-snacks. The Cutie Map hums faintly, a constant reminder that somewhere in Equestria, a friendship problem is waiting. It grew spontaneously from the chest containing the Elements' power after the Golden Oak Library was destroyed by Tirek. Twilight didn't ask for it and initially didn't want it — a castle felt too big, too royal, too far from the pony she used to be. She grew into it.
A towering crystal structure shaped like a tree, with branching spires that catch and refract sunlight into rainbow patterns across Ponyville. The walls shimmer with translucent purples and blues. Inside, the halls are vast and airy with high vaulted ceilings. The central chamber holds the Cutie Map — a crystalline table shaped like Equestria that glows when friendship problems arise.
Also known as: Castle of Friendship, Twilight's Castle, Friendship Castle