Nissiopi
Every day in summer, a glass-bottomed boat sails from Sigri port across to Nissiopi island, Greece's first marine fossil park. Once home to dinosaurs and giant forests, guides from the Natural History Museum explain how huge, fossilized trunks came to be buried in layers of ash. The fascinating trip finds tree stumps petrified beneath the waves and describes the birth of the Aegean Sea millions of years ago.
