Trans-Canada. The world's longest national highway, this ribbon of blacktop covers 7821 km before ending in St. John's, Newfoundland.
In Kootenay National Park, it crosses the east-west continental divide. East of there, the rivers flow to the Atlantic.
Astonishingly, the halfway point lies near Sault Ste. Marie, Ontario. In fact, St. John's is closer to London, England than to Victoria, BC.
There's symbolism at work here. In order to initiate the next journey, it is necessary to return to the beginning. Mile 0, with the next trip still ahead. It's a good place to be in life.