diff --git a/cave_data/1623-2025-HW-00.html b/cave_data/1623-2025-HW-00.html
index 845179d69..5b8b4c7e7 100644
--- a/cave_data/1623-2025-HW-00.html
+++ b/cave_data/1623-2025-HW-00.html
@@ -17,6 +17,7 @@ the form documented at
 
 <cave>
 <non_public>False</non_public>
+<unexplored>True</unexplored>
 
 <official_name>Door in the Mountain</official_name>
 <area>1623</area>