Viaggio negli Stati Uniti dell' America settentrionale fatto negli anni 1785, 1786, e 1787. 2 vols.

Castiglioni was one of very few Italians to make the journey to America and to produce a detailed day-to-day account of his observations in the young country. His "Viaggio" is a systematic compendium of information drawn from both observation and secondary sources on the topography, history, instructions, agriculture and industry of the individual states from Massachusetts to Georgia. Digital facsimile from Google Books at this link. Translated into English and edited by Antonio Pace, with an natural history commentary by Joseph and Nesta Ewan as Luigi Castiglioni's Viaggio: Travels in the United States of North America 1785-87. Syracuse, NY: Syracuse University Press, 1983.