Could the moon's mountains be seen from ancient Ireland?

The writings of Diodorus Siculus describe an island which many think was Ireland, inhabited by the Hyperborei, from which he said the moon appeared closer to the earth, and features like mountains could be seen. He also wrote that these inhabitants knew all about the 19-year cycle of the moon. Interesting stuff. You can hear me reading from Siculus and discussing the passage in the above video.