FacilMap/API/POIs
From OpenStreetMap Wiki
Using the POI layer from FacilMap, you can make POIs on the map clickable. A popup will open displaying various details about the POI. FacilMap uses OpenLinkMap for this.
To add this feature to your map, be sure to load the FacilMap API:
<script type="text/javascript" src="http://api.facilmap.org/ajax-proxy/ajax-proxy.js"></script> <script type="text/javascript" src="http://api.facilmap.org/facilmap.js"></script>
Then add the layer using the following JavaScript code:
map.addLayer(new FacilMap.Layer.Markers.OpenLinkMap("POIs"));
