Posting here because this place is already becoming Reddit-y with the community restrictions.

Here’s a relevant news article: https://uk.news.yahoo.com/people-spot-mystery-mound-world-200306315.html?guccounter=1

Here’s the link to Google Maps to see for yourself: https://www.google.com/maps/place/Centro+de+Confinamiento+del+Terrorismo+(CECOT)/@13.5345556,-88.805859,147m/data=!3m1!1e3!4m6!3m5!1s0x8f7cab0010e2aefb:0x20b92ba5a18de242!8m2!3d13.5335768!4d-88.8051104!16s%2Fg%2F11shscqp7z?entry=ttu&g_ep=EgoyMDI1MDQxNC4xIKXMDSoASAFQAw%3D%3D

What does it look like to you?