Samurai X Cave

The Samurai Cave is where Nya stores her samurai suits and vehicles. It is located in a desert hidden underground. There's a Samurai X symbol on a button that opens the cave. Apparantly, the The Falcon knew the location of the cave. When Lloyd and Sensei Garmadon visited the cave, they borrowed Nya's car to get away from the Digital Overlord.

Trivia

 * The only one who knew about the cave other than Nya was the falcon, until she told the ninja about it.
 * Since the falcon knew the location of the cave, Zane might have known about it.