The pyramids of Egypt and the "Great Flood of Noah's Day" are some prime examples of what woke me up to the truth about the Truth and Bible based religions in general.
There are those who believe, based on their personal research, that the pyramids of Egypt predate the Egyptians. The Egyptian government will not let any scientist who subscribes to this theory anywhere near the pyramids. The bigger point is that this is just one of the many reasons why there never was a global flood as described in the Bible book of Genesis.