diff --git a/cave_data/1623-21.html b/cave_data/1623-21.html
index 564e23a73..b344af029 100644
--- a/cave_data/1623-21.html
+++ b/cave_data/1623-21.html
@@ -32,7 +32,21 @@ the form documented at
 
 <explorers>H&ouml;hlenforschervereinigung Altaussee, 1938</explorers>
 <survex_file>caves-1623/21/21</survex_file>
-<underground_description></underground_description>
+<underground_description>The Rentner Express entrance has these parts to the survey
+<pre>rentner-1
+rentner-1-14
+rentner-1-14-45
+rentner-1-14-45-16
+mondmilchcanyon
+schmuckkasten
+deinhoch
+spiegeltor
+redbullroehre
+eisenbahntunnel
+kartenhaus
+schwarzesmonster
+schwingerclub
+</pre></underground_description>
 <equipment></equipment>
 <references></references>
 <survey></survey>