Over the past recent years, river cruising has increased in popularity.  On Monday, Crystal Cruises announced that it will increase its entry into the River Cruising market with four newly built boats.  They will sail the European Rivers.  A fifth boat will be an existing river boat, The Mozart, revamped and renamed, The Crystal Mozart.  It will enter service on July 13, 2016 cruising the Danube River.  The Crystal river boats will carry between 84-160 passengers.  Crystal fans should enjoy the new offerings.  Anyone interested?