diff --git a/OSINT_Protips/OSINT-Protips.md b/OSINT_Protips/OSINT-Protips.md
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@@ -358,3 +358,29 @@ I have a large list of resources to help identify these different types of milit
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+
+## **OSINT Protip 18**
+
+> Posted on *4/12/2021* at *9:45 PM.*
+> URL: [https://twitter.com/ohshint_/status/1467369618486398978](https://twitter.com/ohshint_/status/1467369618486398978)
+
+[#OSINT](https://twitter.com/hashtag/OSINT?src=hashtag_click) Protip 18:
+
+Online maps exist for just about anything. Locations of military bases to Orthodox churches, and everything in between.
+
+Here's a few:
+
+- [http://u.osmfr.org/m/510207](http://u.osmfr.org/m/510207)
+- [https://sobory.ru/karta/](https://sobory.ru/karta/)
+- [https://alleburgen.de/index-atlas.php](https://alleburgen.de/index-atlas.php)
+- [https://he.net/3d-map/](https://he.net/3d-map/)
+
+[#OSINTProtip](https://twitter.com/hashtag/OSINTProtip?src=hashtag_click) [#GEOINT](https://twitter.com/hashtag/GEOINT?src=hashtag_click)
+
+As always, I keep a list of things like this over on my blog and also on GitHub.
+
+- [https://ohshint.gitbook.io/oh-shint-its-a-blog/osint-web-resources/mapping-and-geo-spatial-intelligence-geoint](https://ohshint.gitbook.io/oh-shint-its-a-blog/osint-web-resources/mapping-and-geo-spatial-intelligence-geoint)
+- [https://github.com/OhShINT/ohshint.gitbook.io/blob/main/Lists_of_OSINT_Web_Resources/1-Complete-List-of-OSINT-Web-Resources.md#mapping-and-geo-spatial-intelligence-geoint](https://github.com/OhShINT/ohshint.gitbook.io/blob/main/Lists_of_OSINT_Web_Resources/1-Complete-List-of-OSINT-Web-Resources.md#mapping-and-geo-spatial-intelligence-geoint)
+
+[#OSINTProtip](https://twitter.com/hashtag/OSINTProtip?src=hashtag_click) [#GEOINT](