Hehe, you guys are sweet. Ok, here they are.
First, you get the water with the road beneath it. This is for if you have a city like Venice or like my Esca Port in my game.
That is for the bottom of the ground. Typically, you should HOLD the shift button when applying this so the road appears to be underneath the buildings instead of built around the buildings.
Now, to make it seem like the buildings are a little bit underneat the water, you use this autotile:
Ok, here is what you do with this one. The road autotile should be on the first layer, and if you want, so are the buildings (to get it so the road doesn't automatically adjust to seem like it is built around the building, hold shift before putting down the building piece.) This autotile would go on the second (or third depending on where you placed the building tile) and would also be applied by holding the SHIFT button as well. And depending on how much you want it to seem like it is underwater, go like 1 or 2 tiles. Or even all the way up to the ground if you want. :3
^^; If you want an example of a step by step how to get it like the example, just ask.
Also, if you don't want a road like-water underneath, I also have this one:
Enjoy~ And, again, if that was very confusing, just ask I will make a step by step if you want me to.