Behind the circular building. There's only one, so it may not always be present. The horn shape on the wild NPC can vary between the two types, so you may need patience to get the style you prefer.
*Level scaling: In Shadowlands most NPCs will scale with the Hunter's level, within the constraints of their level range. Hunters can tame regular NPCs up to 2 levels higher than them, but can only tame elite NPCs of the hunter's level or below.