Glaciarium will teach you about the importance of caring for the environment. Walk around the displays — they'll challenge you to consider your own footprint on nature.
This El Calafate place to learn about the environment is a good place to begin your day of sightseeing. There's plenty to do and see nearby, like Bahia Redonda, Argentinian Museum of Toys, and Plaza de los Pioneros. Wander around at your leisure at Glaciarium before making tracks to these other fine sights.