InspirationUSA The mysterious American cliff ‘castle’ built by people who disappeared David Whitley October 1, 2025 — 12:00am Save You have reached your maximum number of saved items. Instead, Montezuma Castle was created by a group later known as the Sinagua people. Getty Images No Native American group ever went by that name, and no neighbouring Native American group ever referred to the builders of Montezuma Castle as the Sinagua.