Syzigias y quadraturas lunares was written by friar Manuel Antonio de Rivas, a member of the Franciscan order in the Yucatán Peninsula, New Spain, in 1775. The text is the earliest known example of a marvelous journey to the moon written in the New World. In addition to narrating the lunar voyage and scientific experiments of one Onésimo Dutalón in its thirteen-odd pages, it also contains elements of the history of an advanced lunar society, directly and indirectly engages scientific and religious debates of the times, and makes thickly veiled references to figures of the day. As Carmen F. Galán states in her prefatory study, ‘es un manuscrito con demasiadas intenciones’ (38), though herein also lies much of the fascination of this work both for Galán and for the reader.