This paper presents novel use cases and functionalities of the new SampoSampo data service and portal on top of it, based on a Linked Open Data cloud (LOD) of related Cultural Heritage (CH) knowledge graphs of different application domains. The portal is used for searching, exploring, and analyzing entities in the LOD cloud for globally enriched data and for finding semantic “interesting” or even “serendipitous” connections (relations) between the entities with natural language explanations.