Eagle's Eye

This spell lets you concentrate your sight into your mind, and with that, a large, transparent eyeball will appear 250 ft. above you. If the sky is covered, and it cannot go 250 ft. up, it will just go as far up as it can. The eyeball cannot move, but while using you, you gain advantage on Perception checks you make, while looking through the eye, looking out over the land. 

It is easier to see things from such a height, but also harder to spot anything that is trying to hide.