You can fly out to the UNSC Frigate on Hightower with Machinima Controls

Breaking out of the maps never ceases to reveal something interesting about them. In the case of Highpower, you can explore a vast mountain range and check out the UNSC ship. Sadly you can’t check out the Covenant/Banished ship since its too far out of bounds.

(https://www.youtube.com/watch?v=T2SIzhOdlQE)