Today, September 14, we arrived in Sardinia, our most southerly port of call to date. The morning was dedicated to a tour of Europe's most spectacular stalactite and stalagmite formations in the Grotto di Nettuno (Neptune's Grotto). In the afternoon, we visited the principal Nuraghic culture archaelogical site, where we were briefed by a resident local archaeologist. It was interesting to make connections with the site visited the previous day. A tour of the local nature reserve was followed by free time in the charming medieval town of Algher, where a surprise visit to the recently restored miniature Opera House had been arranged. The continuing perfect weather provided an ideal opportunity for refreshments in the many outdoor cafes before we set sail for Corsica during dinner.