I visted Bonifacio and nearby cliffs during my Corsica fall holidays in 2013. The limestone cliffs and town of Bonifacio placed in the deep bay were very picturesque. Shores of Sardinia could be also visible (another TWHS - Archipelago of La Maddalena is very very close). However, I could not see any OUV here and it should not be inscribed in my opinion. For example, I enjoyed limestone cliffs in Parc National des Calanques nearby Marseille much more than those of Bonifacio.