Eastern religions have tended to make mountains places of holiness. The Incas apparently sacrificed children on mountain tops. From Pele in the Hawaiian Islands to Mt. Fujiyama in Japan mountains have been places humans have established as having religious significance. This is understandable as mountains are places that are isolated and have unusual physical properties. The air is thinner with less oxygen on a mountain.
Water boils at a lower temperature due to lower pressure.
Lightning may strike a mountain repeatedly since it is the highest object around. I can tell you from personal experience that it can be terrifying to be on a mountain in an electrical storm. There is no command in the Bible to view any physical place as sacred or special. Nothing happens on mountains that is not able to be understood. In ancient Israel the people were told by God not to make sacred high places and to avoid mysticism.