Serpent's Wall
The Serpent's Wall (Ukrainian: Змієві вали, romanized: Zmiievi valy, lit. 'Winged dragon's walls') is an ancient system of earthworks (valla) located in the middle Dnieper Ukraine (Naddniprianshchyna) that stretch across primarily Kyiv Oblast, Ukraine. They seem to be similar in purpose and character to Trajan's Wall situated to the southwest in Bessarabia.