Description case per vacanze clelia is a group of apartments located in the heart of ustica the beach of cala santa maria with its rocky access is just 600 metres away the island offers a varied range of seaside resorts such as the charming coves of cala sidoti with its pebble and black sand beaches ustica can be easily reached by ferry or by hydrofoil directly from the port of palermo at different hours of the day the complex consists of apartments housed in a single building