Aztalan
Aztalan is the name of a National Park in the American state of Wisconsin, where near the town of the same name are located three ancient pyramid-shaped mounds together with the remains of dwellings. The complex was in use between 900 and 1300 AD and was abandoned for unknown reasons sometime before the latter date. Alexander von Humboldt had views on the etymology of Aztalan that influenced Nathaniel F. Hyer to suggest Aztalan as a name for the site in 1837, because he thought it might have been Aztlán, the original Aztec homeland(a) .
(a) https://www.mysteriousworld.com/Journal/1998/Winter/Aztalan/