Enigmas

2 ancient enigmas across 2 countries, from Yonaguni Monument (8,000 BCE) to Paratoari (Pyramids of Paratoari) (0 CE), and the theories that connect them.

Natural, or human-shaped c. 8000 BCE–1 CE (disputed) · Ryukyu Islands, Japan

Yonaguni Monument

Five fathoms down: terraces, 'steps' and a 'gate' in bedrock — drowned city or geometry of the sea's own making?

Natural sandstone formations · Madre de Dios, Peru

Paratoari (Pyramids of Paratoari)

Satellite-spotted 'pyramids' deep in the Amazon — the map dot where the great-circle theory goes looking for lost cities.