The Biala Ice Caves have been too dangerous for the public for centuries, as they are so vast that you need some kind map to give you directions around them. Hundreds of mara pets have been lost inside these caves, feared dead. Why do people brave these dangerous caves? Because these ice caves are magical and visiting a certain part of these caves can have some amazing affects on your chosen pet. Known side effects have been that they gain large amounts of MP, full health and even magic stats!
You will need to complete the Christmas Treasure Map to enter these Ice Caves. Then you will be granted access, and can visit once every 16 hours.
Sorry, its too dangerous to enter the caves without completing the Christmas Map.