WELL this is a "came from my mind" idea so im not the better doing bridges but i tried it and i think it looks great you can also check it on tinkercad:Make it Bridge challenge (tinkercad.com)

Supplies

You will only need 2 shapes, the round roof and the box

Step 1: Make a Sketch

You can make a sketch using the round roofs and making a hole on them, also add 2 boxes to consider the distance of the bridge travel

Step 2:

Add some color to it because later it will be difficult to add them

Step 3: ADD the Walls and Roof

you can add this things dragging some boxes and then fit them to the surface

Step 4: Decorations

Add the water and color to your bridge you can add the water with the terrain generator.

#Make It Brige Challenge/ Make It Easy

Supplies

Step 1: Make a Sketch

Step 2:

Step 3: ADD the Walls and Roof

Step 4: Decorations

Step 5: ENJOY YOUR BRIDGE

Introduction: #Make It Brige Challenge/ Make It Easy

Supplies

Step 1: Make a Sketch

Step 2:

Step 3: ADD the Walls and Roof

Step 4: Decorations

Step 5: ENJOY YOUR BRIDGE