These are thirteen cards featuring different places. I put some up for sale on ebay. I believe all the images used to be in the public domain, but I have modified one of them. The image I modified is copyrighted by me (James W Gray).
The image used for Volcanic Island is based on the combination of two other images:
Here is a high quality scan of one of these cards and a Magic card, which can be used for comparison. This scan can help you judge the quality of te cards: