Gary Lavalette, volunteer caretaker at the fort in Fairhaven, near the Rhode Island state line, says people have been leaving trash, vandalizing historic structures and publicly urinating. He told WLNE-TV that a stone wall was taken apart with a crowbar and parts of the property look like a “minefield” because people are digging up the ground.

“This fort was never designed for this type of activity,” Lavalette told the station.