My first time on the Subte (Subway); we went down and paid the rest of our rental for the apartment, then went into the most amazing bookstore, a former grand theatre. More later. We also visited a much more humble used book store which had a very humble collection of books in English; not cheap either, at around $3.00 a pop. I got one book in English and a Spanish edition of Little Men, by Louisa May Alcott.
When we came around the corner and saw this building... well, it stopped me in my tracks!