The statue is estimated to date back to the Licchavi period, roughly between the 5th and 8th centuries.
The basalt stone used for the statue is not native to the immediate Kathmandu Valley, suggesting it was transported from a distant quarry.
The water within the tank is channeled from a natural spring originating from the nearby Shivapuri mountains.
According to local belief, the reflection of the deity in the water is considered as sacred as the statue itself.
The reclining posture symbolizes the cosmic sleep of Vishnu during the dissolution of the universe, according to Hindu cosmology.
Budhanilkantha Temple is home to a single, monolithic black stone sculpture of Lord Vishnu reclining on a bed of serpent coils in a recessed water tank. The statue measures approximately 5 meters in length and is carved from a single block of black basalt. The figure is depicted with four arms, holding the traditional symbols of Vishnu: a discus, a conch shell, a lotus, and a mace. The temple is located at the base of Shivapuri Hill on the northern edge of the Kathmandu Valley. The central deity is often referred to as the 'Sleeping Vishnu' or 'Jal Narayan'. The stone structure appears to float on the water surface, creating a visual illusion that has defined the site for centuries. It remains a primary destination for Vaishnavite pilgrims, particularly during the Haribodhini Ekadashi festival.
The raised platform surrounding the tank provides the best vantage point to capture the full length of the reclining statue.
Walk around the entire perimeter of the water tank to view the intricate carvings from different angles.
Visit during the month of Kartik for the Haribodhini Ekadashi festival to witness the site at its most active.
Check the light levels, as the deep tank can create high-contrast shadows that may affect photography.
Do not attempt to enter the water tank, and avoid loud conversations near the main altar where devotees are praying.
Particularly crowded during the major annual Haribodhini Ekadashi festival in autumn.
Remove footwear before entering the temple premises; dress modestly covering shoulders and knees; do not touch the water or the statue.