The National Museum (El Museo Nacional) was an old military fort that was converted into a museum when the military was disbanded following the Costa Rican Civil War in 1948. It was a nice museum including pre-columbian artifacts and history, as well as Costa Rican history.
The butterfly room as you enter the museum. It was full of beautiful flowers, but not many butterflies:
Learning Costa Rican history:
Pre-Columbian artifacts and exhibits:
An interesting artistic dome outside of the museum: