Lisbon’s dramatic cathedral (Sé Cathedral) is well-appreciated form the outside, but let’s appreciate it from the inside too! It has some of my favorite things: Roman ruins in the cloister and lady tombs!!
The Lady tombs even feature book reading, which as I can tell you (as I wrote my dissertation on lady tombs) is really really rare.
To see the cloister and the choir with the lady tombs you have to pay a few euro entrance fee, but they are totally totally worth it. The best three euros (I think?) I spent in Lisbon. Except the bifana sandwich!