Gunnar Caya
Google
This is a nice hilltop temple near Punakha. Obviously photos are not allowed inside the temple, but on the top floor (I forget if it's the 3rd or 4th floor) there is an outside platform where you are allowed to take photos of the surrounding scenery.
But the best part of this temple isn't the temple itself, but the walk here. It's uphill for sure, but it's a pretty gradual climb in elevation and the path is well maintained. Should be doable for anyone in halfway decent physical condition. The walk is enjoyable, and the views of the surrounding mountains and the valley below are great.
Definitely recommended for those willing to do a little walking.