diff --git a/.gitmodules b/.gitmodules
index 5ba5d748..ab3f12bc 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -146,3 +146,6 @@
 [submodule "mods/illuna_extras"]
 	path = mods/illuna_extras
 	url = https://git.tchncs.de/Illuna-Minetest/illuna_extras
+[submodule "mods/fun_caves"]
+	path = mods/fun_caves
+	url = https://github.com/duane-r/fun_caves
diff --git a/mods/fun_caves b/mods/fun_caves
new file mode 160000
index 00000000..f1f0abcc
--- /dev/null
+++ b/mods/fun_caves
@@ -0,0 +1 @@
+Subproject commit f1f0abcc166d3bb94c202543d7eec492d3d26949