Stonehenge (Wiltshire, England)
In 2013, tourists stuck chewing gum to some of the Stonehenge stones during solstice. A few stones were painted with graffiti. Some stones had oil dripped on them. One group of visitors even tried to set the stones on fire. Vomit, urine and feces were found. In recent years, security efforts have been bumped up, including armed police on patrol.