Mauna ʻAla in the Hawaiian language, is the Royal Mausoleum of Hawaii and the final resting place of Hawaii's two prominent royal families: the Kamehameha Dynasty and the Kalākaua Dynasty.
Wikipedia https://en.wikipedia.org/wiki/Royal_Mausoleum_(Mauna_ʻAla)
Official website http://www.hawaiistateparks.org/parks/oahu/royal.cfm
Address 2261 Nuuanu Avenue, Honolulu, HI 96817, USA
Coordinates 21°19'31.243" N -157°50'50.919" E