Thonis-Heracleion, an ancient port, sank, rediscovered in 2000s with remarkable artifacts.
Stone jars in northern Laos, mystery remains about their purpose and ancient civilization.
Robert Marx claimed Roman amphoras in Brazil, but evidence of their presence remains unproven.
Nazca Lines in Peru, mysterious geoglyphs, remain unexplained, possibly linked to water rituals.
The Paracas Candelabra in Peru remains mysterious, possibly a navigational tool or symbol.