Inca's Riches

When the Spanish invaded South America, they were on a search for great wealth. It was true that the Incas and the Aztecs built cities of pure gold, (or rather, they bolted pure gold panels to the walls of the buildings.) The Spanish looted the native cultures for all the wealth that was within them. One of the Conquistadors discovered that a certain Incan noble had a great wealth hidden in a cave somewhere. He went after him to find the location of this vast treasure. But the man would not tell the Spaniard. Then, when it was learned that the Spaniard had every intention of killing the man once he had found out where the gold was, it was seen to that the entrance to the cave be sealed up such that no one could ever find it. The Incan man was put to death in an occult ritual, as he was no longer needed. But to this day, no one has found the entrance to the cave that contains the treasure. Information has arisen, however, from those who have been in search of the treasure, that there is a giant pillar in the surrounding country, which has engraved upon it several cryptic symbols. At a certain time of the day, when the sun is just right, you can observe these symbols through a field lens. Many have observed these symbols, but no one can understand their meaning.
Rumour has it that there are a group of Incan priests who still know the whereabouts of the cave entrance, but they are the sworn guardians of the treasure, and will never let the secret leave their own company.