Fushimi Inari Taisha
It is the head shrine of about 30,000 Inari shrines which are traditionally familiar throughout Japan and the god is worshiped for bountiful harvests of grain, business prosperity, the safety of households, recovery from illness, and wish fulfillment. This shrine was established in 711 AD.
The hike to the top is a bit tiring, but you get an amazing view of Kyoto city. Totally worth it!