What is Shambhala?

"The Cintamani Stone (or Chintamani Stone) is a legendary artifact of Buddhist and Hindu mythology, a “wish-fulfilling” gem of extraordinary power.

According to Buddhist legend, it fell from the stars and landed in Tibet, where the ancient Buddhists revered it as a spiritual jewel. However, its power was considered so great, and so potentially disastrous, they ultimately sent it to the mystical, hidden city of Shambhala."
https://www.strangerdimensions.com/2012/02/20/the-cintamani-stone/

"This was the stone that Nicholas Roerich carried back to Shambhala"
https://www.bibliotecapleyades.net/sociopolitica/sociopol_shambahla11.htm

"Hitler was in Shambhala, an underground centre in Antarctica"
https://en.wikipedia.org/wiki/Esoteric_Nazism

"Then the king of Shambhala will emerge from Shambhala with a huge army to vanquish "dark forces" and usher in a worldwide Golden Age."
https://www.ancient-origins.net/ancient-places-asia/mysteries-kingdom-shambhala-001529