Complex sentence: Central Croatia straddles boundary of the Dinaric Alps and the Pannonian Basin, with the boundary of the two geomorphological units running from Žumberak to Banovina area, along the Sava River.
Split into simpler sentences: Central Croatia straddles the boundary between the Dinaric Alps and the Pannonian Basin. The boundary of these two geomorphological units runs from Žumberak to Banovina area, along the Sava River.