Sri Sandhaikadai Mariamman temple is located in Udhagamandalam, Tamil Nadu. It is nearly 500 years old. The presiding deities are Maha Mariamman and Maha Kaliamman. The holy water is Amirtha Pushkarani.
The important festivals that are celebrated in a grand manner are Navarathri days in Purattasi (September-October), during the whole of February month is the longest and biggest festival of the temple held for 28 days, Mother Aadhi Parasakti is taken in procession in different forms as Durga, Meenkshi, Heddhai Amman, Kamakshi, Parvathi, Rajarajeswari and Bhagavathi and Fridays in the month of Aadi (July-August).
In this temple, devotees throw salt of the deity because it is believed that as salt dissolves in water same as the sins committed will also get dissolved soon. This activity has religious and social importance in this temple. It is to be highly noted that in the sanctum sanctorum, there are two Ambicas idols.
The temple is kept open for the devotees in the morning hours and later in the evening hours only daily. On the days of festivals and religiously auspicious days, the temple is kept open throughout the day.
It is strongly believed that the mother Goddesses cures impaired vision persons, those infected with small-pox and other serious illness plus handicapped. Devotees also seek boon for early marriage and child. Devotees and tourists who visit Ooty the popular hill station make it a point to visit this temple with great devotion and dedication. Special pujas are conducted on the days of purnima and Amavasya too.