In 1869, the emperor's move to Tokyo led Kyoto's economy and population into decline. A canal was dug as a last resort to revive the city. It still supplies water, generates power and boosts tourism.

From the neon lights of Tokyo, the temples and shrines of Kyoto, and the awe-inspiring beauty ... did a couple of centuries ago and its lovely canal, teeming with swans and local guides, has ...