The most ancient temple in the whole of Goa is  the Mahadev temple which is  located at Tambi Surla in Sanguem taluka.

The small, beautifully carved and perfectly proportioned black basalt temple is dedicated to Lord Shiva and is considered to be the only specimen of Kadamba-Yadava architecture in basalt stone which is preserved in Goa.The temple faces east so that the rays of the rising sun fall on the deity at the crack of dawn. Bas-relief figures of Lord Shiva, Lord Vishnu and Lord Brahma, with their respective consorts appear on panels at the sides of the temple.

There is a ‘linga’ mounted on a pedestal inside the inner sanctum and local legend has it that a huge King Cobra is in permanent residence in the dimly lit interior.

The festival of Mahashivratri is celebrated with all pomp and gaiety at the temple by the local people residing in surrounding villages.