A short drive inland from Loano, the Grotte di Toirano are among the finest karst cave systems open to the public in Liguria. The guided tour takes you through a sequence of chambers filled with stalactites and stalagmites, ending in a section with palaeolithic bear remains and prehistoric human footprints pressed into the ancient clay floor.
The caves maintain a constant temperature of around 15°C — welcome in summer, bracingly cold in winter. Tours run throughout the day, and the village of Toirano above the caves has a medieval castle and a pleasant piazza worth lingering in after the underground visit.