The Vedas and the Upanishads speak of a golden lid (Hiranmaya Patra in Sanskrit) which divides the lower rational mind from the higher planes of the Mind above us. This post explains the significance of that Golden Lid in the words of Sri Aurobindo & The Mother.
The ancient Hindu scriptures speak of the Universe as an inverted Banyan/Ashwattha tree with its roots in the Higher Worlds of Sat-Chit-Ananda (Existence-Consciousness-Bliss) and its branches in the many lower worlds that have been created. This is a comprehensive list of references to this tree in the ancient scriptures and the works of Sri Aurobindo and The Mother. The world tree motif is present in many other religions and mythologies (See World-Tree)