Here's why:
* Navel Rock is a fictional location. It's a popular destination in the popular game "Animal Crossing: New Horizons."
* Mystic Tickets are also fictional items. They are used in the game to travel to mystery islands.
If you're playing Animal Crossing: New Horizons, you'll need to get a Mystic Ticket by visiting the island of Kapp'n, who appears at the pier at night. He offers boat trips to mystery islands, and you'll have a chance to find a Mystic Ticket along the way.
There's no real-world equivalent of Navel Rock or Mystic Tickets!