diff --git a/pages/concepts.map.md b/pages/concepts.map.md
index 1adae99..5561491 100644
--- a/pages/concepts.map.md
+++ b/pages/concepts.map.md
@@ -90,6 +90,7 @@
 -------------------
 
 -------------------
+- https://geodienst.github.io/lighthousemap/
 
 -----------
 -----------