If you want to get the hierarchy of the directory in a tree format there is the tree command for that. But here I have put the command in a small loop so that the output becomes more informative with the directory and file sizes also.
Try this command out in the bash shell and see the output:
# for i in $(ls -d */); do tree $i ; done
Note: If the directory structure is too long to caontain it in a screen you can use the following to save it to a file:
# for i in $(ls -d */); do tree $i ; done > result.txt