I've been to Canada twice, but not in the north. First time I traveled around British Columbia, into the Rockies as far as Golden and around Vancouver Island. Second time was just over the border to view Niagara Falls.
I have been underground in Mount Isa Mine, Queensland, Australia. Mine is 1,900 metres (just over 6,200 feet) deep. I've been right to the bottom where the primary crusher is located.
Primary Crusher