You'll find elaborate carvings in every corner of the temple, and it amazes me that such marvels could be carved by hand in the ancient times. (inscriptions in the cave date back to late 7th century and early 8th century.)
Cave one consists of - The nataraja avatar of Shiva, Ardhanarishvara sculpture, Harihara avatar of Shiva, Kartikeya on his peacock, Nagaraja carving and Mahishasura mardini statue of Durga.
Cave two consists of - Trivikrama avatar of Vishnu, Varaha avatar of Vishnu and Swastika present on the ceiling.
Cave three consists of - Trivikrama, Varaha, Vishnu on Seshnag, Pillar statues, Narasimha and Harihara and ceiling with Frescos.
Good luck spotting each one of them!