Refers specifically to the tomb of an emperor or member of the imperial family. A formal, historical term.
There are many imperial tombs in Kyoto.
御陵 is the respectful, everyday term people use when speaking of an emperor's tomb, while 陵 is the plain dictionary word for the same thing.
Standard kanji spelling for an imperial tomb.
Mixed kanji-kana spelling; less common but still encountered.
Compound of the honorific prefix 御 (ご) and 陵 (りょう, 'mausoleum, imperial tomb'). The reading りょう for 陵 is the on'yomi.