Museo Nacional de Ciencias Naturales

Updating--June 2022: Dinosaurs! They still have dinosaurs! Plus the historic skeleton the megatherium (an extinct ground sloth). Additionally, exhibits in the primary building have been progressively redone over the last several years to focus on biodiversity, evolution, heritability of genetic traits, and historical figures important to the museum's history. Plan between two and four hours. Tickets are checked for entrance on both sides of the building, and once exiting the initial (west) side of the building, you're not able to re-enter, so time any gift shop purchases on that side accordingly.

New ranking: five stars. Dinosaurs, the megatherium, and a generally calm environment.

Original--May 2017: Dinosaurs! Smaller than anticipated, but they've got dinosaurs! A little confusingly laid out, in that the paleontology section is accessible around the corner from the main admission and ticketing office. Plan about two hours if you (or your travelling companion) like dinosaurs.