aerie; eyrie
Refers specifically to the nest of a bird of prey, such as an eagle or hawk, built on a cliff or in a tall tree. The spelling 高巣 literally means 'high nest'.
We could see an eagle's aerie on top of the cliff.
Compound of 高 (taka, 'high') and 巣 (su, 'nest'). The reading たかす is a straightforward combination of the kun'yomi readings of the two kanji.