To navigate the Quicktime VR Virtual Tours on this site, click & hold while dragging your mouse inside the image. Notice that your cursor changes shape, allowing you different options within the space.
When the cursor appears like this, you can click & hold while dragging your mouse inside
the image to navigate within the virtual tour.

Options located on the VR panorama window toolbar allow you to:
Zoom in to the panoramaZoom out of the panorama