The temple:
Outside:
The temple is extremely difficult to find. Mostly because it moves locations at random intervals. But also because the exterior of the temple is constantly changing, cloaked in illusions. Sometimes it looks like a stone castle. Other times it looks like a forest of trees. Sometimes it looks like nothing at all, invisible to the eye. Some followers have found it simple by accidentally running into the thing!
The "real" appearance of the temple is of a simple wooden structure, only a few stories high. It's cherry wood, glistening and shining with polish. There are many windows on every floor, affording those inside a view of the ever-changing scenery as the temple moves around.
There is no visible door. One can feel around the walls until falling through it, or followers will intuitively know where it is and can walk right through the section of seemingly-solid wall to get to the inside.
The inside:
The inside is always changing. Illusions and ever-changing walls create a labyrinth within the temple. Most of it is illusion but it's impossible to tell that from reality. Some of the shifting walls are real walls, confusing those who aren't blessed by the goddess into near madness if left without help. You can bumble along feeling out real boundaries and doors, but with the shifting real walls mixed in with illusion, it can be maddening trying to get out.