How do I get past the machine safely

Hint 1 of 12:

You can't ride past it.

Hint 2 of 12:

Go to the Sultan(ess)'s Palace.    Try some of the black circles.

Hint 3 of 12:

Where does the one in the well take you?

Hint 4 of 12:

Not to This is My Kinda Dock!!!