Kamayama Jinja Shrine stands on a site tied to Hiko Itsuse no Mikoto, the elder brother of Emperor Jimmu in Japan's imperial mythology. The shrine has long been treated as an important local sacred place and appears in old shrine records for Kii Province.
It is a quieter stop than Wakayama Castle or Kimiidera, but worthwhile if you are interested in the city's older religious landscape.