Jump from the Exterior Achievement
1. Wrong forum. This is an achievement from the The Nightmare Within release.
2. Yes, it is outside, but you reach it from the top of the tower’s inside (After having completed the final instance to be precise).
I got to the top of the tower and jumped but it gave me one achievement. how do i get the second?
Diving goggles on the corner of the platform in front of the entrance to the boss chamber
After beating the hybrid boss, don’t leave the instance through the “door button” – go through a “back door” portal instead, it will take you to the outside of the tower. The other pair of diving goggles are at the end of a plank there.