Douwe Osinga of Google created this cool tool to visualize countries that someone has visited into a world map (see an example below). To use it on WiserEarth's profile or wikipages however, require a simple workaround as WiserEarth does not allow for images from unauthorized outside servers.

So, here's the simple workaround:

1. Go to the website of the Visited Countries project and follow the instruction to create your map (ends with clicking the "Go" button).
2. Instead of copy pasting the given code into the "HTML" view of WiserEarth's page, you must first save the image to your computer (right click on the image and select "Save Image As...").
3. Upload the image to your page by using "Insert or Upload an Image" button.