Agartha

Agartha is a legendary kingdom that is said to be located on the inner surface of the Earth. It is sometimes related to the belief in a hollow Earth and is a popular subject in esotericism. Agartha is frequently associated or confused with Shambhala which figures prominently in Vajrayana Buddhism and Tibetan Kalachakra teachings and revived in the West by Madame Blavatsky and the Theosophical Society. Theosophists in particular regard Agartha as a vast complex of caves underneath Tibet inhabited by demi-gods, called asuras. Helena and Nicholas Roerich, whose teachings closely parallel theosophy, see Shambhala’s existence as both spiritual and physical.