The Triveni Sangam in Allahabad is a confluence of three rivers: the Ganga, Yamuna and Saraswati. Of these three, the River Saraswati is invisible and is said to be flowing beneath the earth. It meets the other two rivers from the base. The point of confluence is a sacred place for the devout, and is of high religious importance. A bath here is said to wash all karmic burden and free the human from the cycle of birth.

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The site of Sangam is a treat to the eyes. One can see the muddy and pale yellow water of Ganges merging with green water of Yamuna. The Ganges is not so deep at Sangam, while Yamuna is 40 ft deep near the point of nexus. The river Yamuna ends at this point while the Ganges continues after this till it meets the sea at the Bay of Bengal.

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The Triveni Sangam is understood to be the same place where drops of Nectar fell out of a pitcher, from the hands of the demigods, so it is believed that a bath in the Sangam will also bring mukti. Devout Hindus from all over India come to this sacred pilgrimage point to offer prayers and take a dip in the holy waters.

The Sacred Kumbh Mela is held every 12 years at the banks of the Sangam. According to myths, the Prakrista yajna was first performed here by Lord Brahma. That is how Allahabad received its ancient name, Prayag. Allahabad is also called Tirtha-Raja (Prayag Raj), king of all holy places. It is said that Lord Rama visited Allahabad when He was in exile.

Veni Madhav Mandir located at Daranganj close to the sacrosanct Triveni Sangam is one of the oldest shrines dedicated to Lord Vishnu in Prayag. He is the NAGAR DEVTA. This is one of the Dwadasha Madhav Temples of this historical city.

This ancient temple dedicated to Lord Krishna and Lakshmi Devi has been mentioned in the Matsya Purana, Agni Purana and Padma Purana as the first seat of Lord Vishnu in Prayag. According to the Hindu scriptures, Lord Vishnu was asked to reside in Prayag after he saved his devotees from the atrocities of a rakshasa named Gajakarna who had managed to swallow the holy waters of Ganga, Yamuna and Saraswati.

Nag Vasuki, an ancient temple located on the bank of the holy Ganges to the north of the sacrosanct Triveni Sangam draws lakhs of devotees on the auspicious Kumbh, Ardha Kumba, Magha Mela, Naga Panchami and the month of Shravan. A trip to Prayagraj is deemed complete and successful only if a pilgrim has a dip in the Sangam, has darshan of Bheeshma Pitamaha and offers prayers in this temple of great antiquity.

Brahmeshwar Mahadev temple on the banks of the Ganges in Allahabad. There is an old belief that the foundation of worship of Shiva was first laid in this temple on earth.

It is believed that Brahma created the universe in Prayag. At that time, Shiva was invoked and his original form was established. This is why this temple is called Brahmeshwar Mahadev Temple. It is written in Skanda Purana and Matsya Purana that when Lord Vishnu and thirty-three crore gods and goddesses prayed to Prajapati Brahma for the creation of the universe, he first invoked Vighnaharta Ganapati and then invoked Lord Shiva and built the first temple for his worship.

Lord Shiva was first worshipped here
According to both the Puranas, after the call, the temple of Lord Shiva was first built by Brahma. 

Hanuman Mandir is famous as Bade Hanuman Ji Mandir near the banks of Ganga and Yamuna in Prayagraj near Sangam and Fort. In Sangam city, he is known as Bade Hanuman Ji, Kila Wale Hanuman Ji, Lete Hanuman Ji and Bandh Wale Hanuman Ji. [1] Here, the idol of Hanuman Ji is in a lying down position below the ground and Hanuman Ji is in a position holding Ahiravan with one of his arms and another demon with the other arm. This is the only temple in which Hanuman Ji is in a lying down posture.

It is mentioned in the Puranas that during the end of Kalpa or Pralaya when the entire earth is submerged in water, even then one Banyan tree survives. God resides in the form of a child on one of the leaves of this tree called Akshay Vat and observes the eternal mystery of creation. References to Akshay Vat are found in Kalidas ' Raghuvansh and the travelogues of Chinese traveller Huen Tsang . 

Patalpuri Temple is an underground set of temples. The temple is located within the grounds of the historical Prayagraj Fort earlier Allahabad Fort. There are several God and Goddess idols in the temple. As per the mythology, Lord Ram & Mata Sita worshiped here while on their “Vanvas”. The temple is inside the fort & very close to other important pilgrimage points like Triveni Sangam, Bade Hanuman Temple, etc.

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The Undying Banyan Tree, known as “Akshayvat” grows outside the temple.  One of the underground temple’s shrines is formed by the tree’s roots.

The ancient city of Prayagraj is revered for its spiritual potency, deep connection to Maryada Purushottam Rama and the Ramayana and the repository of knowledge and wisdom, Bharadwaja Brahmarshi. Bharadwaja Brahmarshi, one of the Sapta Rishis  (the others are Kasyapa, Atri, Vishwamitra, Gautama, Jamadagni and Vashistha) is venerated by scholars and those well-versed in the Hindu scriptures as the epitome of the quintessence of the Vedas. His understanding and experience of the Supreme Truth is expressed in several texts that are so progressive in its composition and subject that it has baffled accomplished scientists, architects, doctors, engineers and metallurgists.

Alopi Devi Temple is a temple located in the Alopibagh area of ​​Prayagraj in the Indian state of Uttar Pradesh . It is near the holy Sangam , where the Ganges , Yamuna and the mythical Saraswati rivers meet. The Kumbh Mela is also near this place.

The specialty of this temple is that there is no idol of any deity in this temple, but there is a wooden swing or 'doli', which is worshipped. Alopi means lost or disappeared. The origin of its name lies in the Hindu belief that after the death of his wife Sati , the grief-stricken Shiva used to travel in the sky with her dead body in despair. To relieve him from this pain, Vishnu threw his Sudarshana Chakra on the corpse , as a result of which various body parts fell at various places in India, which became holy by the touch of the body parts of the goddess and hence were considered holy places for pilgrimage. The last part, the left hand, fell at this place and disappeared as soon as it fell, giving it the name "Alopi".

There are 51 Shakti Peethas of Goddess Sati. According to Hindu religious texts, wherever parts of Sati's body, her clothes or ornaments fell, Shakti Peethas were formed there. These holy pilgrimage sites are spread across the entire Indian subcontinent.The ancient temple of Goddess Sati is located in Mirapur locality near Yamuna river in the south of Prayagraj city, which is known as Mahashakti Peeth. This temple has special significance. It is believed that Sati's hand had fallen here. 

Kalyani Devi temple in Prayagraj is regarded as one of the 51 Shaktipeeths of India. It is believed that three fingers of Goddess Sati had fallen here while Lord Shiva carrying her corpse. This temple is among the most ancient of the Shaktipeeths and finds mention in many ancient texts and manuscripts. Shakti is the spiritual energy of Maa Durga which bestows the ultimate mercy of Moksha and reunion with Param Brahma.

The present temple was constructed in 1883 but the idols of the goddess are supposed to be around 1500 years old. Kalyani Devi Temple house three deities of Mother Goddess in the form of three fingers of Mother Sati. Kalyani Devi is in the center flanked by Chinnamasta Devi on the left & Shankar Parvati on the right side. 

The place is located on the bank of the holy river Ganga. The Sringverpur Dham has been mentioned as the capital of Nishadraj(King of Fisherman), who helped Lord Ram to cross the Ganga river during the “vanvas”. This place is also famous because of the Shringi Rishi Ashram & Temple.

Samudra Koop that literally translates to ocean well is one of the most sacrosanct tirths of Prayagraj. Located in the archaeologically important town of Jhusi, this ancient well was established during the reign of the Chandravamsa dynasty (Lunar dynasty) roughly around 7100 BCE. This well has been mentioned in the Matsya Purana and Padma Purana as a divine entity and it is highly recommended that one should spend some time in meditation and prayers and circumambulate the well that is equal to doing pradakshina of the universe. The waters of the well is said to have medicinal and healing properties.

Someshwar Mahadev Mandir (also known as Someshwar Nath Mandir) situated across the holy Yamuna River in Arail village is one of the eight important tirthsthalas of Prayagraj. This sacrosanct temple finds mention in the Padma Purana and Shiva Purana.  This temple was established by Lord Chandra and historical and archaeological evidence found at the temple site suggests that this temple has existed since the ancient times. The most fascinating feature of this temple is that the trishul (trident) on top of the temple moves in accordance with the movement of the moon around the earth! This phenomenon has been observed by scientists, physicists and locals with the former two having no explanation while the latter convinced of the potency of Someshwar Mahadev.

Mankameshwar Temple is one of the oldest Shiva temples in Prayagraj and sits atop the Sheshnag Hill on the bank of the Yamuna River, a little distance away from the sacrosanct Saraswati Ghat. 
 
It is also mentioned that in the Satya Yuga, Lord Shiva manifested himself as a Swayambhu Linga along the Yamuna River. When Bhagawan Rama reached Prayag during his exile, he along with Sita Mata and Lakshmana rested at Akshayavata. He then performed jala abhishek to this Shiva Linga and sought his blessings to complete the exile.

According to the Padma Purana, five Shiva Lingas were consecrated in this temple as means of atonement by the descendants of Parikshit Maharaj after he was bitten by Takshaka. It is believed that one who has darshan of the Shiva Linga here will neither have any fear of snakes nor will he be bitten by one nor will his descendants be. Takshaka, the king of the Nagas (serpents) has been residing in the holy city of Prayagraj for thousands of years.