Reference
OpenAI's Answer
For information about free entrance days at the Archaeological Museum of Dion, you can visit the official Ministry of Culture and Sports website: Ministry of Culture and Sports - Archaeological Museum of Dion. They provide details about free and reduced admission to Greek State Archaeological Sites, Museums, and Monuments.
You may find free entrance days on specific nationwide events or cultural celebrations such as International Museum Day, the last weekend of September for European Heritage Days, and certain national holidays. Checking the site or contacting the museum directly for current specifics would be advisable.
Here are some images from the museum and archaeological site:
Follow Up
Related
How have various cultures in Central Asia contributed to the region's archaeology?
What are the significant archaeological sites mentioned in Central Asia?
What types of artifacts have been discovered in Central Asia and their significance?
What function did Group 37 serve during the Late Classic period?