Virtual Reality Modelling Language Worlds
You will need the following plugins to view VRML Versions 1.0 and 2.0.
Click on both links below and follow the directions.
Install Cortona VRML Client
Install Cortona VRML 1.0 Converter

After the installation view some sample VRML worlds by clicking the on the links below.
Some VRML Virtual Reality Chemical Structures by Phil Pavlik

Simple Cubic Body Centered Cubic Face Centered Cubic
Sodium Chloride Methane Molecule Mark's Cluster Molecule
Buckminster Fullerene Acetic Acid