The Shantadurga temple is located about 30 Kms from Panaji (Panjim), the capital of Goa. It is situated in Kavalem of Ponda taluk of North Goa district.
Shantadurga, also known as Shanteri/Santeri, is the form of the Goddess Durga, commonly worshipped in Goa. She is also called Saibini in Konkani as a mark of reverence.
The construction of the temple is unlike Hindu temples found in India. This temple seems to be influenced by the European architecture (perhaps because of the Portuguese occupation of Goa). 
(Photo - jonhurd)
The temple is surrounded by greenery all over and is found at the foothills of a mountain.
There is a main temple and three smaller temples of other deities which have been built on three sides of the temple.
The temple consists of a collection of pyramidal roofs with an interesting dome. The pillars and floorings are made of Kashmir stone. The temple has a huge tank, a Dipa Stambha and agrashalas (guest houses).
Legend tells of a celestial battle between Shiva and Vishnu and Santeri ("Peacemaker") acting as the mediator and solving the problem.
While most villages in Goa had a Shantadurga Temple or at a least a shrine dedicated to Shanteri, a famous Shantadurga Temple was present at Quellossim in Salsette.
This was destroyed by the Portuguese and Jesuit missionaries and the idol was shifted to Kavalem in Ponda across the Zuari River.
The Goddess is typically depicted as holding a snake in each hand, representing the demoniac tendencies which are kept in check by her. She also has fish on her crown, as she is the chief patron of fisher folk.
Shree Shantadurga is the Kuldevta (family presiding deity) of many Hindus including Saraswat and Karade Brahmins, Daivadnya Brahmins, Marathas, Kunbis and Kolis.
Many Goan Catholic families also continue to part take of worship in this temple due to their familial links with the temple and to seek Durga's blessings. She is known by many names and forms and is worshiped throughout South India.