In Celtic mythology, Mag Mell ("plain of joy"), also called Tir na n-Og ("land of youth"), was the underworld. Unlike the underworld in most mythologies, Mag Mell was a pleasurable paradise, either an island or at the bottom of the ocean.
... it to Albany, discovered Hudson Bay
Alexander von Humboldt, (1769-1859), explored Central and South America, visited Siberia
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Helge Ingstad, (1899-2001), Norwegian, ...