Snake Princess' Palace
From Dragon Ball Encyclopedia
Snake Princess' Palace (蛇姫 の 館, Hebihime no Yakata) is the home of the Snake Princess.
Dragon Ball Z
Snake Princess' Palace appeared in "Princess Snake's Hospitality". It was located along the twists and turns of the Serpentine Road. Son Goku was sucked into the palace where he met the Snake Princess. She took an instant liking to him and wanted him to stay with her forever. Goku needed to reach the end of the Serpentine Road and reach North Kaio's World, however, therefore he escaped.