The End

Visit Zelda as an adult! Definitely worth a trip!

Back in Hyrule Field. Go to the entrance of the Market and use Moonjump (hold L) to jump over the bridge.
You're now in the Goron Shop. Turn back and exit (sometimes if you roll while exiting you'll jump off and fall until the game resets!).
You've arrived in Zelda's Garden!

Note: If you go there as a kid, you'll see the Triforce on Link's left hand!