Which loka is highest?

Could you please clarify which context you are referring to when you ask "Which loka is highest?"? The term "loka" can have different meanings depending on the cultural or religious tradition being discussed. In Hinduism, for example, "loka" refers to the various realms or planes of existence, including the physical world and various spiritual or celestial realms. If you are asking about Hindu mythology or philosophy, then the answer to "Which loka is highest?" would depend on the specific tradition or belief system being considered. Some traditions may view the highest loka as a place of divine bliss and enlightenment, while others may see it as a place of ultimate reality or pure consciousness. Could you provide more context or clarify your question further?