One of the smaller temples

Some say, don't you exaggerate a litlle with emphasizing the Cosmic Womb all the time. Well, apart from the Kala's the inside of the main temple can be considered a symbolic Womb as well. Just like the crypts in Christian churches.....

Two Makara's at the entrance, Kala is absent

Inside the "Womb" to find a most sacred (Tantric) object will not be a surprise anymore

The "classical" explanation is that Phallus and Yoni symbolize the God Shiva and his lover Shakti. Originally, it is more like the Cosmic Mother (Yoni) and Her Son/Lover Shiva (Phallus)

MotherGoddess Durga defeating the Demon Mahasurisa