Amazon Neptune supports Cross-region Snapshot Copying
Amazon Neptune now supports copying snapshots (created either automatically or manually) across regions. AWS customers are interested in building applications that run in more than one public AWS Region. Now customers can use cross-region snapshot copies with Neptune to simplify and streamline the data manipulation operations associated with building and running global graph applications using both Apache TinkerPop Gremlin and RDF/SPARQL.
Source:: Amazon AWS