If you are shuddering at the thought of how many “karet” transgressions one performs when ascending the Mount, permit me to fill you in on a little halachic geography.
Har Habayit is made up of two areas, the center is solid bed rock, which is surrounded by land fill made by Herod when he turned the Temple Mount from a square into a rectangle. The building of the Bet Hamikadash was 100 amot high (50 meters) equivalent to a 25 story building. Herod did not build with steel and aluminum but with huge stones, like those in the Kotel, so the sheer weight of the Bet Hamikdash was too heavy to be held up by land fill. Meaning, that even though we do not know the exact point of the Azara, we do know where it is not, and so we tread only on the land fill. Indeed the Kotel is no more than a supporting wall for the land fill to prevent slippage.