The Americas

These are inaccessible to Europans. Proverbially so. However, whatever event made it that way seems to have been a recent one, since the Heterodyne Boys are known to have traveled for a time with an (apparently, given the name, Native) American Spark named Thundering Engine Woman (not to be confused with the version to be found in Master Payne's Circus of Adventure), who came to Europa and was extremely popular there. Her current whereabouts are not attested, but it seems likely that she went home while the getting was good.