Most of these photos are stereo (3D). The single image and long panorama ones aren't. The stereo photo are parallel viewing. They are most easily seen with a viewer. I recommend the Loreo Lite 3D viewer.

I have played around with the eye separation, the distance the left and the right photo where taken from. The father apart the eyes, the greater the distance at which depth can be perceived. Some spacing was as much as 50 feet or more. At that distance stereo depth can be perceived in a mountain range. It is as though you are a giant and therefore the scene looks like a miniature set. In some cases they are a little difficult to look at if the foreground objects or people get in the way. Similar to holding up a finger too close to you face. In other cases the subject may have moved from one eye view to the next.

I've also experimented with moving the eyes closer together on close up objects, such as flowers and rocks. The result of this seems less noticeable but, in some the subject can appear somewhat monumental. I think would work better with a camera mount so eye positions can be more precisely controlled. A common artifact in the stereo flowers is the wind blowing.

Given the challenges and errors in these photo, I think you will still enjoy them.