As you might have noticed, I've begun work on my shell for Ahra Pahts.
Initially, I made the obelisks and central structure quite tall (as you can see below):
But I was reminded about the height limit and had to find a way to lower them by 15 feet. After some excavating, I managed to get them under the 60-foot limit:
To keep the sides from caving in, I used the same strong material found in the canal walls. But now I need to solve the problem: how to prevent people from dropping 15 feet when they enter the shell?