Alonissos Island National Geographic Names Alonissos Island a Destination on the Rise 6 years ago National Geographic Traveller has named Greece's Alonissos Island to a list of destinations on the rise for 2021. Greece to Open First Underwater Museum in Alonissos 6 years ago Greece will open its first underwater museum beginning in August. The park, located off the coast of Alonissos Island in…