How do you get on the cliff top in Lego harrypotter years 5-7?

You're probably talking about the clifftop in Hogwarts, Year 5 where you need to reach the Astronomy Tower for the "Astronomy Class" mission. Here's how to get there:

1. Find the Hidden Path: The path to the Astronomy Tower is hidden behind a large rock formation near the edge of the cliff. Look for a gap in the rocks and use your character's disarming spell (Accio) to pull a lever that opens a secret passage.

2. Follow the Path: The path will take you through a small tunnel and then up a winding staircase.

3. Reach the Tower: At the top of the stairs, you'll be in the Astronomy Tower!

Important Notes:

* Year: This specific location and method are only available in Hogwarts, Year 5.

* Characters: Any character you choose can complete this mission, as long as they have the necessary spell.

Let me know if you have any other questions or need help with any other part of the game!