Bevelle's coordinates are the same as "Highbridge."
However... I kind of doubt that it was Bevelle's treasure that you missed. Bevelle's treasure was standing in front of the exit, as I recall. You had to use a Destruction Sphere to complete Bevelle, didn't you?
Spoiler: Since I'm assuming you're at Baaj, what color is the sphere that won't light? That's the best way to distinguish which temple it is that you've missed. |