Guess "only the Chateau" knows for sure....
I don't know. I suppose the confessional could have been filmed way down there. but remember we have that car that goes along a roadway in one of the confessional shots. I can't see any roadways in the area of that hill. There are some assumptions going on here that should be kept in mind so that if they are wrong we can still hang on to valid contingencies.
1) Cluebox cannot be at pit stop
2) Location of confessional is the location of the pit stop
3) Roadblock starts exactly at the cluebox
4) Roadblock takes place at a single location
5) Shadows are always caused by sunlight
Here is a scenario that may work:
Teams are directed to the overlook at the War of Pacific Historical Park (this is the cluebox that we see the Chas at)
It directs them to the Navel Base. They are driven onto the base and they read a clue there.
It's a Roadblock.
Team member who elects to do the Roadblock is driven to a special location.
The non-Roadblocker is driven someplace else.
Roadlock gets completed and both are driven off base.
The clue directs them to Asan Beach where they look for something like old Japanese gun emplacements
Or maybe it just says to look for the pit stop mat.