Besides St. Simon's Church, visit Café Ritual in the vicinity. Taste good espresso, it's a must when visiting this cafe. Google users are quite generous with Café Ritual: it was granted 4.6 stars.
Service was friendly and only our waitress's positive attitude saved me from sadness as I heard they were out of ingredients for my drink. Instead I took Blue Lagoon, which was actually nice, also mojito was well done. Nice location to relax in.