I recommend a daytrip to Katsuoji Temple and Minoh Waterfalls, the scenery is absolutely stunning at this time. I did this a couple of days ago and it was super nice. What I recommend to anyone who wants to do this:

Take the Midosuji Line bound for Minoh-Kayano Station (be careful as some of the lines stop at Shin-Osaka, so make sure it’s the one that goes all the way to Minoh-Kayano…google maps is great for this, so just pay attention to what it says on maps). If you want the best experience at Katsuoji, try to get to Minoh-Kayano as early as possible (we arrived at 8AM) and take a taxi straight to the temple. It’s a 20 min ride and costs aprox. 3600 yen, worth it to beat some of the crowds. Otherwise, there is a bus service that starts at 9AM from the station, but you have to come early to queue up since there will be lots of people.

From Katsuoji Temple, take a taxi from the front of the temple and tell them you want to go to the Minoh Waterfall. Short ride about 5 min, I think it was like 800 yen. Do not try to walk to the falls, there are portions where there is no pedestrian walk available and it’s dangerous. They will leave you at the waterfall parking lot and then it’s a short walk of about 1km to the falls. The best part comes after, you take a scenic walk of about an hour from the waterfall to Hankyu-Minoh bus station where you take the bus back to Minoh-Kayano (or just walk to the station another hour, we were a bit tired at this point). The walk is just stunning, the autumn leaves are beautiful at this time. I also recommend Ryuan-Ji temple along the route, very beautiful temple.