What is "zagrobla"

Zagrobla (, Zahreblia) is a settlement in the administrative district of Gmina Wielkie Oczy, within Lubaczów County, Subcarpathian Voivodeship, in south-eastern Poland, close to the border with Ukraine. It lies approximately north-west of Wielkie Oczy, south of Lubaczów, and east of the regional capital Rzeszów.