I have done that a few times when fishing!
Logistics and Transport
Whilst not strictly on-topic, but in the same vein, we have 100s of miles of railways in this country. Some are still in use, (Great Western Railways not so much )obviously, but a lot are now disused. They have one point in common with the waterways, though - they are all built on flat terrain so will make easy progress when in a "get home" scenario.
Just because I'm paranoid, doesn't mean they're not all out to get me