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 <h4>Maps, Geolocation and Transport</h4>
 <ul>
+   <li><h5>Social media</h5><ul>
    <li><a href="http://photo-map.ru/">photo-map.ru — search geotagged photos from VK.com</a></li>
    <li><a href="https://map.snapchat.com/">Snapchat map</a></li>
    <li><a href="https://mattw.io/youtube-geofind/">YouTube Geofind — view YouTube geottaged video on map</a></li>
    <li><a href="https://www.flickr.com/map">Flickr Photo Map</a></li>
-
-  
-   <li><a href="https://www.mindat.org/countrylist.php">Mindat.org</a></li>
-   <li><a href="https://www.webcamtaxi.com/en/russia/moscow-province/badoo-office.html">Web Cam Taxi</a></li>   
-   <li><a href="http://radio.garden/visit/moscow/MQfEnBji">Radio Garden</a></li>
-   <li><a href="https://www.nsinternational.com/en/stations/station-maps-floor-plan">Station maps floor plan</a></li>
-   <li><a href="https://www.gpsvisualizer.com/">GPS Visualizer</a></li>
-     <li><a href="https://www.mapchecking.com/">Map Checking</a></li>
-    <li><a href="https://ridewithgps.com/users">Ride With GPS</a></li>
-    <li><a href="https://www.riskmap.com/">RiskMap.com</a></li>
-   <li><a href="https://liveuamap.com/">Liveuamap.com</a></li>
-    <li><a href="https://www.crisisgroup.org/crisiswatch">Crisisgroup.org</a></li>
-   <li><a href="https://www.splcenter.org/hate-map">Hate Map</a></li>
-   <li><a href="https://emmeline.carto.com/me">emmeline.carto.com</a></li>
-    <li><a href="https://www.cfr.org/global-conflict-tracker/?category=us">Global Conflict Tracker</a></li>
-   <li><a href="https://acleddata.com/dashboard/#/dashboard">Acled data crisis map</a></li>
    <li><a href="https://iknowwhereyourcatlives.com/cat/99638e1fe0">I know where your cat lives</a></li>
-     <li><a href="https://juckins.net/amtrak_status/archive/html/history.php">Amtrak Status Maps Archive Database</a></li>
-    <li><a href="https://www.ventusky.com/">Ventunsky.com weather map</a></li>
-     <li><a href="https://www.wunderground.com/history">Wunderground weather history</a></li
-   <li><a href="https://soar.earth/">Soar.earth</a></li>
-     <li><a href="https://www.marinevesseltraffic.com/submarine-vessels-tracking-map">Submarine Vessels Tracking Map</a></li>
+      
+  </ul></li>
+
+   
+     <li><h5>Nature</h5><ul>
+          <li><a href="https://www.mindat.org/countrylist.php">Mindat.org</a></li>
+          <li><a href="https://www.ventusky.com/">Ventunsky.com weather map</a></li>
+          <li><a href="https://www.wunderground.com/history">Wunderground weather history</a></li
+          <li><a href="https://soar.earth/">Soar.earth</a></li>
+          <li><a href="https://academo.org/demos/geodesics/">Geodesics on the Earth</a></li>
+            <li><a href="https://www.google.com/earth/">Google Earth</a></li>
+        </ul></li>
+   
+   <li><h5>Transport</h5><ul>
+          <li> <li><a href="https://www.nsinternational.com/en/stations/station-maps-floor-plan">Station maps floor plan</a></li>
+       <li><a href="https://www.marinevesseltraffic.com/submarine-vessels-tracking-map">Submarine Vessels Tracking Map</a></li>
     <li><a href="https://www.ntsb.gov/_layouts/ntsb.aviation/index.aspx">World Aviation Accident Database 1962-2007</a></li>
      <li><a href="https://data.ntsb.gov/carol-main-public/basic-search">World Aviation Accident Database 2008-2021</a></li>
     <li><a href="https://map.nbr.org/interactivemap/">MARITIME AWARENESS PROJECT</a></li>
-   <li><a href="https://academo.org/demos/geodesics/">Geodesics on the Earth</a></li>
-   <li><a href="http://rzjets.net/aircraft/">rzjets.net/aircraft</a></li>
+       <li><a href="http://rzjets.net/aircraft/">rzjets.net/aircraft</a></li>
    <li><a href="https://globe.adsbexchange.com/">Globe.adsbexchange.com</a></li>
      <li><a href="https://www.track-trace.com/container">Track Trace</a></li>
      <li><a href="http://container-tracking.org/">Container Tracking</a></li>
@@ -41,13 +36,38 @@
     <li><a href="https://www.cma-cgm.com/ebusiness/schedules/voyage">CMA Voyage Finder</a></li>
    <li><a href="https://theshippingdatabase.com/">The Shipping Database</a></li>
      <li><a href="https://www.submarinecablemap.com/">Submarinecablemap.com</a></li>
-    <li><a href="http://www.wandermap.net/en/#/z15/55.7522011,37.6156006/terrain">Wandermap — hiking routes world map</a></li>
-     <li><a href="http://www.runmap.net/en/?tab=new#/z15/55.7522011,37.6156006/terrain">Runmap — running routes world map</a></li>
-   <li><a href="https://www.bikemap.net/">Bikemap — biking route world map</a></li>
-    <li><a href="https://www.google.com/earth/">Google Earth</a></li>
-    
-     <li><a href="https://transtats.bts.gov/ONTIME/">Transtats.bts.gov (Flight schedules and data on the actual departure/arrival times of flights in the U.S. for more than 30 years (!))</a></li>
+       <li><a href="https://transtats.bts.gov/ONTIME/">Transtats.bts.gov (Flight schedules and data on the actual departure/arrival times of flights in the U.S. for more than 30 years (!))</a></li>
    
+      
+      </ul></li>
+   
+    <li><h5>Routes</h5><ul>
+          <li><a href="https://ridewithgps.com/users">Ride With GPS</a></li>
+         <li><a href="http://www.wandermap.net/en/#/z15/55.7522011,37.6156006/terrain">Wandermap — hiking routes world map</a></li>
+         <li><a href="http://www.runmap.net/en/?tab=new#/z15/55.7522011,37.6156006/terrain">Runmap — running routes world map</a></li>
+         <li><a href="https://www.bikemap.net/">Bikemap — biking route world map</a></li>
+       
+       </ul></li>
+   
+   <li><a href="https://www.webcamtaxi.com/en/russia/moscow-province/badoo-office.html">Web Cam Taxi</a></li>   
+   <li><a href="http://radio.garden/visit/moscow/MQfEnBji">Radio Garden</a></li>
+   <li><a href="https://www.gpsvisualizer.com/">GPS Visualizer</a></li>
+    <li><a href="https://www.mapchecking.com/">Map Checking</a></li>
+   
+
+    <li><a href="https://www.riskmap.com/">RiskMap.com</a></li>
+   <li><a href="https://liveuamap.com/">Liveuamap.com</a></li>
+    <li><a href="https://www.crisisgroup.org/crisiswatch">Crisisgroup.org</a></li>
+   <li><a href="https://www.splcenter.org/hate-map">Hate Map</a></li>
+   <li><a href="https://emmeline.carto.com/me">emmeline.carto.com</a></li>
+    <li><a href="https://www.cfr.org/global-conflict-tracker/?category=us">Global Conflict Tracker</a></li>
+   <li><a href="https://acleddata.com/dashboard/#/dashboard">Acled data crisis map</a></li>
+
+     <li><a href="https://juckins.net/amtrak_status/archive/html/history.php">Amtrak Status Maps Archive Database</a></li>
+   
+  
+    
+    
    <li><h5>Communications</h5>
       <ul>
   <li><a href="https://opencellid.org/">Opencellid.org. The world's largest Open Database of Cell Towers</a></li>