Surrounding Chester, the walls can be accessed at a number of points around the city. It is easy walking - a bit over 2 miles - with only a few sections of steps once you are on it, so suitable for most.
For Minerva’s Shrine follow the Old Dee Bridge across the river. Edgar's Field is on the right, just past the Ship Inn. The shrine can be seen on the side of the low rock outcropping which rises in the middle of the field.