You can browse Wikidata entries in its pure RDF form. This helps understanding the pure RDF view of Wikidata. The official HTML view of a Wikidata entry looks different for design reasons, see the documentation about the RDF Dump Format.
You can browse every entry in Wikidata:
Trifid and in particular our upcoming Hydra View component can be used to wrap any SPARQL query into a simple REST API. In this example you can browse space probes in Wikipedia via REST. Just click on the link and follow your nose!