Three Border Mountain

Its name comes from the fact that the borders of three 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.

The mountain is located on the Buda side, at 495 metres (1,624 ft) above sea level.

On average, the temperature is a couple of degrees Celsius less than on the Pest side.

[citation needed] The non-public Hármashatárhegy Airport (ICAO code: LHHH) has a single 1000 x 100 m runway and serves the Budapest-Hármashatárhegy region.