Interesting little chapel with great view and you should make stop here while enjoying that very old narrow and little dangerous road.
But I recommend not coming with car but using old Napoleon road as they called all them built during short French occupation like that. Starting from Stari Grad you can use 3 different mountain trails:
1. first one starts just before entering tunnel on the new road and you can either walk from town or park in front of tunnel
2. best one is starting from Maslinica bay and most of the way you really follow old Napoleon road, i even met guy with mountain bike so you can also use it here.
3. third one is from the next bay after Maslinica and you first go along the coast then through pine forest and finally with macadam road until you reach Napoleon road
All three are easy and are marked and all end on Napoleon road which is amazing because of the views and when you see that all that was before cultivated with lavender, olives and vines.
Before coming to chapel you can go directly to Velo Grablje and then to Milna and finally Hvar which I will go next time.