The adjacent Silesian Lowland includes the Silesian Lowlands and the Silesian-Lusatian Lowlands. These two lowlands are separated with each other by Dolina Kaczawy, and from the Sudetes by a steep morphological edge located along the Sudeten Marginal Fault, extended from Bolesławiec (the Northwest) to Złoty Stok (the Southeast). The southern part of the Lowland includes The Sudeten Foreland, consisting of quite low Wzgórze Strzegomskie, , Grupa Ślęży (Mount Ślęża, ), and Wzgórza Niemczańsko-Strzelińskie (Gromnik Mountain, ). Lower hills occur also in areas of Obniżenie Sudeckie, Świdnik, and Kotlina Dzierżoniowska. The eastern part of Silesian Lowland consists of the wide Silesian Lowlands, located along banks of the Oder River. The eastern part includes also Równina Wrocławska with its surrounding lands: Równina Oleśnicka, Wysoczyzna Średzka, Równina Grodkowska and Niemodlińska. Dolina Dolnej Kaczawy (Kotlina Legnicka) separates the Silesian Lowlands from the Silesian-Lusatian Lowlands, which includes Wysoczyzna Lubińsko-Chocianowska, Dolina Szprotawy, and wide areas of Bory Dolnośląskie, located to the north from the Bolesławiec-Zgorzelec road. From the North, the lowlands are delimited by Wał Trzebnicki, consisting of hills that are long and over high, in comparison to neighboring lowlands, Kobyla Mountain, . The range of hills includes Wzgórza Dalkowskie, Wzgórza Trzebnickie, Wzgórza Twardogórskie, and Wzgórza Ostrzeszowskie. Obniżenie Milicko-Głogowskie, with Kotlina Żmigrodzka and Milicka, is located in the northern part, within the hills.