Stretching nearly 80 miles long and cutting a great isle in two,
we are still searching for the reason I was built some 2000 years ago, and need more clues.
Did I keep barbarians out, or did I just show my vast Empire’s great clout?
The answer is up to you.
Where in the world is this?
Note: Once someone has guessed the correct answer (here in a comment, or on Facebook, Twitter or Instagram), I’ll post the answer in the comments below and add the correct location on the map. Good Luck!