The Belize–Guatemala border stretches over 266 kilometers through dense forest and sparsely populated areas.
The borders of the Roman Empire, which changed over time as Rome's power grew and waned, are a significant aspect of the empire's history.
Roland's Breach is a natural gap, 40m across and 100m high, at an altitude of 2804m in the Pyrenees.
The Oder–Neisse line is the international border between Germany and Poland.