I Follow Rivers
People follow rivers since they found out they need water for living (long time ago, I would assume :) ) and a lot of major cities are situated on them for that reason.
This is half-accurate, half-made-up fact, which is somewhat self-evident, but don't quote me on this one :)
They also build bridges like this one to ease up the life on the sides (swimming is a bit overrated for your daily commute :) )
Title inspired by +Lykke Li.