Europe’s many are widely used for transportation, leisure, and tourism.

The answer would be canals
-Hope it helps!

The answer is Canals. They use canals for tourism, transportation, and lesiure. For the fun of it. It's great for touism because it's a peacful relaxing ride, with a good view. It's good for lesiure because it's something fun to do while passing the time, and it's a great way to get from one place to another. The answre is Canals.
~Deceptiøn

If i remember correctly it was caused by people hurling bodies at a country for some reason and them they all became infected