Becán is a Mayan fortified city which is now a ruin. Its unique attributes of a deep moat with high earthwork walls and tall towers match the descriptions of fortifications built by Captain Moroni in the Book of Mormon. My early-morning religion class has been studying this section and at the same time (synchronistically!) I came across an article about Becán. Searched around and found this photo, which also served the Challenge topic of “Abandoned” quite nicely.
related link:
Aerial view of Becán showing the deep moat and high walls. http://mayaruins.com/becan/aerial1.html