I installed the Lazy Load plugin (tried several of them). They all seem to work well except for that it seems not to load one specific image.
The link to the image is valid.
Originally, I used a Google Maps icon (ico) file. I replaced it with a png, which seemed to solve the problem. But the solution was temporary. Even with the png file, it doesn't seem to be loading.
Here is the link to the image: http://notallthosewhowanderarelost.ca/wp-content/uploads/Post Elements/maps2.png
Here is my page: http://notallthosewhowanderarelost.ca/iceland/
The image appears in the large photo captions (starting halfway down the page).