Temples exist in each of the hills surrounding Sabarimala.
While functional and intact temples exist at many places in the surrounding areas like Nilackal, Kalaketi, and Karimala, remnants of old temples survive to this day on remaining hills.
It is believed that the angry saint Parasurama Maharshi who retrieved Kerala from the sea by throwing his axe, installed the idol of Ayyappa at Sabarimala to worship Lord Ayyappa.
If one has to undertake a pilgrimage to Sabarimala, certain customs are to be strictly observed.
A pilgrim attending the Mandalapooja should observe austerities for 41 days.
They have to wear black or blue dress. During this period, the pilgrim should abstain himself from non vegetarian food and carnal pleasures.
They do not shave till the completion of pilgrimage and smear Vibhuti or Sandal paste on their forehead.
Pilgrims set out in groups under a leader, and each carry a cloth bundle called Irumudi kettu containing traditional offerings.
