Here are some sample VRML worlds locally produced:
You should begin with the "Stairway to heaven" (stairway.wrl) which links you directly to every other world.
You can get more information about each world in the file worlds.html (in the directory docs) as well as general comments about world building in the file realisation.html (in the same directory docs).
The zip files provided here are complete archives of each world. Download and be sure to read the readme.txt file.