@slowwalker, There are so many piled stones by the road to the temple. So many unique designs included there. Better explained about those stones. Entrance gate of Muryang-sa Temple same looking with previous temple when you introduced to us.

When you die, you have to pass this entrance to enter into the paradise.
At that time, those 4 heaven kings will decide to pass you into the paradise or not.

Yep...All Buddhists believe about Karma and when we will die we have to enter good or worst world. So doing good work currently better for after our death. Those kings had scary looks. After look final image I think inside the Muryang-sa Temple so impressive. Totally perfect photo clicks with description. Thanks.