Hármashatárhegy (German: Drei·hotter·berg; Its Austrian toponym ("Hotter") also Hungarian: Hármas-Határ-Hegy means "Three Border Mountain") is the name of a mountain in the city of Budapest, Hungary. Its name comes from the fact that the borders of 3 cities (Buda, Óbuda, Pesthidegkút) met at this point in the 19th century. Today, these cities have merged into Budapest, but the mountain's name has remained unchanged.