Several years ago I had one of my Canon cameras converted to an infrared camera. The sensor in an infrared camera is sensitive to the infrared spectrum, which cannot be seen by the human eye. The photo file must then be manipulated to adjust color channels, color temperature and other editing devices to make it artistically appealing. The types of effects are almost limitless and allow for a lot of creativity.
These can be purchased just like photo prints in an assortment of sizes.