This article is about something that is no longer active in the Club Penguin universe.
|Underground Opening Party|
|When||May 26–29, 2006|
|Free Item(s)||Miners Helmet|
The Underground Opening Party was a party in Club Penguin that was held from May 26 to May 29, 2006. This party was held to celebrate the opening of the Cave, Boiler Room, and Mine. It was members-only.