Complex sentence: Border markings are comparatively inconspicuous, in common with many international borders in the European Union although, unlike many other EU borders, there are no signposts at crossing points notifying travellers that they are entering a different jurisdiction.
Split into simpler sentences: Border markings are comparatively inconspicuous, in common with many international borders in the European Union. Although, unlike many other EU borders, there are no sign posts at crossing points notifying travellers that they are entering a different jurisdiction.