This was made on Tinkercad

Supports Yes
20% infill
0.2 layer 

You may want to scale the hanging piece slightly smaller so it fits into the base a bit better

How to assemble

For the hanging piece there is a hole on the base glue in place

Look at the first picture for where to put the bridge

There is an arch too glue that on one side of the bridge

There is a big hole near the middle that is where you put water or other plants 

Everywhere else place sand, plants. dirt, rocks, make this garden yours!

You could even put a fountain in the water spot too.

Post your makes and other comments please!