This is a map that Eric shot off quickly and poorly, just to see if he could get it to work on RPubs.com.

You can choose layers (or backgrounds) to include from the “layers” button (under the minus-sign button in the top left). You can recenter the map by clicking on one of the buttons in the lower right. Zoom in or out by two finger scrolling. Pan by click-dragging the map. Click on any spatial feature for more information about it. To scroll up or down the web page (to see the bottom of the map, for example), use the cursor keys.