Thanks to My Maps Plus for help with the coding.
How to use this map:
Click on any blue marker to see what happened there. When the info box pops up, click on "find out more" to find out more. Click on the X to close the info box. To zoom in and see the place close up (you can really see the temple or the pyramid or the cathedral!), leave the info box open and use the zoom scale on the left side. You can move the whole map by pulling on it with your cursor.