These are wrl files which display in your browser and allow you to walk through and interact with a model of the buildings.
VRML 2.0 will display these wrl files and for the best views select full colour in the setup menu (right click your mouse in the display area).
An alternative browser plug-in can be downloaded from Cosmo Software.
The Main House
The Swimming Pool
You can find out more about 3D models at: