I see Afghanistan and Bangladesh are competing in the 'Backwards Third-World Dump'

[Ash]

As I recall, much of the Wandle where I grew up is underground. It didn't seem to possess much in the way of divinity.

All of the underground rivers in London are associated with a divinity, in the Ben Aaronovitch novels.

Also:

"In Xanadu did Kubla Khan
A stately pleasure dome decree:
Where Alph, the sacred river, ran
Through caverns measureless to man
Down to a sunless sea."