The Naga Pokhari royal water tank in Bhaktapur Durbar Square (Nepal)
The water tank is surrounded by a stone Naga (mythical cobra snake), with Naga heads on top of columns.
Bhaktapur is one of the Royal Cities of Nepal, located about 10 Km East of Kathmandu.
For more info about Bhaktapur, read en.wikipedia.org/wiki/Bhaktapur.