It's a really decent museum with a beautiful and spacious park outside the museum where you can wander around seeing tomb stones from Classical till Roman times as well as large vessels well known as pithoi. The museum has a collection of findings from the excavations that where made in Eretria from the Swiss Archaeological School. You can easily see the archaeological findings without spending so much time and to get informed about the history of city through the years.Near by you can visit the ancient theatre although you can't have an access to the inside.