Corridors like palindromes

Just returned from a Valentine's weekend in Dublin's fair city. The sun shone and we ate and drank and had a good time all in accord with the "Corporate Mission". The apartment block where Mary lives Monday to Friday has multiple doors, lobbies and lifts which makes it all very confusing - as you exit the lift to turn left or right? Mary complained, in a most felicitous turn of phrase, that the building had "Corridors like palindromes".