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A monument for the tomb of an unknown Spanish soldier La tumba en Yauco del soldado desconocido who was found dead during the Spanish-American War, is located on this highway at kilometer 0, per historic records and http://home.coqui.net/sarrasin/monu.htm#anchor640192

I don't know if something about this should be added to the article.

Here is the historic description of the tomb. https://es.wikisource.org/wiki/P%C3%A1gina:Cr%C3%B3nica_de_la_guerra_hispano-americana_en_Puerto_Rico.djvu/238 The Eloquent Peasant ( talk) 14:41, 4 July 2022 (UTC) reply