I never get tired of going to Mt Hiei and taking photos. The three Enryakuji temple complexes are fabulous and are different within themselves. I just wish I could read more Kanji so I can read the information sheets to share with you all. You can buy a day ticket that will allow you entry into all three temple complexes and also includes free bus shuttle between them.
Allow a whole day to explore this site. Enryakuji was first established back in the Heian Period so enjoy your walk through Japanese Buddhist history. Many buildings pre date the 1670s despite the best attempts of Oda Nobunaga who tried to completely destroy it.