🇧🇷 Brazil · Ancient city
Akakor & Akahim – Underground Amazonian Cities
Claimed 14,000–10,000 BCE gods' arrival; literary 1976 invention · Claimed Ugha Mongulala with 'Gods' (von Däniken flavored)
Tatunca's 13-gated underground Purus valley city for Ugha Mongulala — traced to German-born Günther Hauck, murdered journalist source.