Sylvester and his little buddy headed to the Magna Sanctum Temple early in the morning as they'd have to take a boat to reach it. The temple was situated on an entirely different Peninsula, the Golden Peninsula.
He did not encounter his friends along the way, so he took a boat alone. Not everyone could get to the Magna Sanctum, however. Even if one took the boat, when deboarding it, there would be sentries to check your identity and permission.
The temple was renowned as the holiest site for the Faith of Solis, but what made it that was unknown. There was no talk about anything being buried there. Nor was there anything supernatural. It was just a giant golden structure founded by the first Pope more than five thousand years ago.