The last Hyouka place I checked out while in Takayama was the school. This school is called Gifu Prefectural Hida High School in real life.
Image from Episode 1 - 00m06s
The main school entrance.
Image from Episode 5 - 07m06s
The trees on the right are larger, but otherwise it's the same.
Image from Episode 12 - 06m18s
A shot from slightly further away.
Image from Episode 18 - 10m22s
Reverse angle. You can see some of the details on the left that's still the same, but the path up to the school has changed.
Image from Episode 8 - 20m59s
They've built a new bridge here that curves to the left since the anime was made. That's why the path up to the school has been changed as well.
Image from Episode 5 - 24m48s
Since they've changed the path up to the school, they've also moved this wall that shows the name of the school.
Image from Episode 1 - 00m03s
This side road to the school is still the same though. If you look closely at the photo you can see a small crossing path that leads to a side entrance of the school on one side and the sports field on the other.
Image from Episode 3 - 23m28s
If you walk up to the side entrance you can get this picture of the school building.
Image from Episode 18 - 09m04s
You can also get some pictures of the sports field from the side road.
Image from Episode 14 - 09m08s
Some of the buildings in the background on the right are the same.
Hyouka Key Visual 1
The side road was also seen in the first key visual for the show.
Image from Episode 12 - 01m31s
And finally a shot of the school website, which is different in real life.
This location was visited on 2016/10/10. The school website screenshot is from 2016/12/27.
If you decide to visit this place yourself, do remember that it is a school still in use and you should NOT enter it.
School official website
Special thanks to the ones who went here before: