"The remarkable thing about Worsley's canals is the fifty miles underground: that seems to have escaped your writing" (Stu)...
"Where earliest of coal-canals meet,
    And have their waters ochred
By the seepage of old-deep-mine earth;" (me, above).

Also, an update on the above "Up Uluru?" poem:
On last night's "By any Means" (BCC) I noticed that tourists can still climb it - the team were only prevented by it being a windy day.
And by the way, 20 years ago, I also travelled mostly overland, and took a similar route to them - see poems 21 to 26, if you wish.