Kāmākhyā  Temple Gawahati Assam.  ref: goo.gl/GqX51p

It is dedicated to goddess Kāmākhyā , the temple being one of the 51 Sakti Pitas.  Kāmākhyā  Temple is the star temple on Nilachal Hill (700 feet ASL) with the central deity Kāmākhyā , housing also shrines of TPS, Mātaṅgī and Kamala with seven satellite temples dedicated to the other seven Mahāvidyās: Kali, Tara, Bhuvaneshwari, Bhairavi, Chinnamasta, Dhumavati, and Bagalamukhi. Tantric and mother goddess worshippers are her staunch devotees. The temple has a cruciform base with hemi-dome. The temple has four connected chambers inclusive of the east-end Garbhagṛiham. The inner sanctum, worshipped as Kāmākhyā , has no idol but is a 10-inch-deep yoni-like depression always full with water fed by a perennial stream.

The inner sanctums of other Vidyas are also yoni-shaped depressions in stones filled with water below the ground level.

The Kāmākhyā  temple chamber (Calanta) adjoining the Garbhagṛiham to the west has an opening on the north side. Calanta house a movable idol of Kāmākhyā .  To the west of Calanta is Pancharatna the rectangular chamber with a flat roof and five domes, of which the central dome is larger. To its west is the Nityamandapa chamber.

Nearby this temple complex is the Ashvagirantā, wherein is a temple for Krishna who killed Narakāsuran. 

The pilgrims worship Kāmākhyā  goddess for progeny, removal of impediments to marriage, success in studies...

The 10th century kings helped renovate the temple with follow-up in 1665. The outer structure resembles the temple. Once entrance inside takes place, it is all a cave. One must climb down 10 steps with no lights to guide you. One must use the wall as the guide. In the subterranean Garbhagṛiham there is one oil lamp, the light of which ceremonial worship of Kāmākhyā  takes place.

There is a small rocky mound known as Meru Form. The water flows around the Meru along a circular fashion. The Yoni Pitam is below the water level. The Pujari guides the hand of the votary to touch the Pitam with the head resting on the Meru.

The sacrificed sheep, chicken... carcasses lay around floating submerged in the water. If you were inclined to touch Yoni Pita, you approach the assistant Pujaris. The flowing water below the Meru is Saubhāgya Kundam. Exiting the central shrine, one can see eight kinds of Kāmeśvarī-Kāmeśvara metal statues.

This is the spot where Siva and Sati sported. When Sati died and Vishnu dismembered the dead body, the Yoni fell here. There were 108 places where her body parts fell; each was a śakti Pita. Fifty-one Sakti Pitas are identified and existing today.