Aerie (noun)

1. A nest of a bird of prey, especially an eagle, typically built high in a tree or on a cliff.
2. A high place, such as a cliff or mountaintop, where birds of prey live.

Origin:

From the old french aire, meaning "a nest or breeding place of a bird of prey".

Examples:

1. The hikers stumbled upon a golden eagle's aerie in the mountain.
2. The aerie was located high on a cliff and was difficult to reach.
3. The aerie was home to a pair of peregrine falcons.
4. The aerie was a natural fortress that provided the birds with a good view of their surroundings.
5. The conservationist was able to track the bird's migration path by studying the aerie.