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.
Aerial view of Becán showing the deep moat and high walls. http://mayaruins.com/becan/aerial1.html