神宮【じんぐう】
high-status Shinto shrine with connection to imperial family, imperial Shinto shrine
宮殿【きゅうでん】
palace
子宮【しきゅう】
womb, uterus
宮廷【きゅうてい】
imperial court, royal court
迷宮【めいきゅう】
labyrinth, maze, mystery, dungeon
竜宮【りゅうぐう】
Palace of the Dragon King, palace from the story of Urashima Tarō (said to be located at the bottom of the sea)