One of my favorite museums in San Salvador. If you go during lunch hour, stop by their local restaurant for a great meal. Also make sure to pass by their gift shop.
It's a small museum but it has the essential view of modern art and culture that represent San Salvador. We're a country very focused on our capital, which is not great, but in the museum you can have a glimpse of our culture in a great environment.
A perfect places to know about El Salvador's culture. Easy to get there by taxi or public transportation. Cheap entrance fee, less than $5.00 USD.