It was one of the passages between East and West Berlin. The Glienicke Bridge became the chosen site for prisoner exchanges between the KGB and the CIA from 1961-1986.
After acquiring a chunk of land from France in 1803, President Thomas Jefferson decided to fund an expedition to find out exactly what he had bought. Well, in any case he got us a national park.
Cambodia is a country scarred by a series of armed conflicts in the last century. One of the lasting consequences is the presence of undetonated landmines scattered all over it.