diff --git a/cave_data/1623-2006-06.html b/cave_data/1623-2006-06.html
index 82ce84518..6a77c74d6 100644
--- a/cave_data/1623-2006-06.html
+++ b/cave_data/1623-2006-06.html
@@ -31,7 +31,9 @@ the form documented at
 
 <explorers>Origin obscure; surveyed 2001 CUCC (Mark S, Mike Cox)</explorers>
 <survex_file>surface/1623/bogen.svx</survex_file>
-<underground_description>Ducking under the entrance arch leads to a spacious tunnel with snow on the floor. This narrows and slopes uphill to a second skylight entrance.</underground_description>
+<underground_description>Ducking under the entrance arch leads to a spacious tunnel with snow on the floor. This narrows and slopes uphill to a second skylight entrance.
+<p>
+It is quite a large area and deep enough to be a thunderstorm refuge.</underground_description>
 <equipment>None required</equipment>
 <references></references>
 <survey>Notes in 2001#11 apparently, but this wallet is missing</survey>