A temple where the Linga disappeared and re-appeared several times

A temple which was built under Sage Agastya's guidance

God Shiva resides here are Raja Rajeshwara along with Godess Shri Parvathi 

Unlike other temples there is no Dwajasthambha. And no annual festials are conducted here  

The sanctum sanctorum with its majestic proportions is a fine example of Kerala temple architectural style. 

Both God Shiva and God Vishnu's aspects are represented in the Jyothirlinga and hence called Raj Rajeshwara!