Penrith and The Border (UK Parliament constituency) includes part of the English border with Scotland. The neighbouring constituency of Hexham (together with Berwick-upon-Tweed) also takes in the border area. The name stems from the fact that when the constituency was first created it consisted of the Penrith Rural and Urban Districts, the Border Rural District and also the Alston with Garrigill Rural District. A heavily undulating, mostly farmed terrain dotted by market towns and historic villages, with wooded mountainsides and heath-covered tops, the constituency is focused on the Eden Valley between the Pennines and the Lake District, with the vale of the River Irthing above Carlisle. In
Red River of the South formed part of the US–Mexico border from the Adams–Onís Treaty (in force 1821) until the Texas Annexation and the Treaty of Guadalupe Hidalgo. The Red River is the second-largest river basin in the southern Great Plains. It rises in two branches in the Texas Panhandle and flows east, where it acts as the border between the states of Texas and Oklahoma. It forms a short border between Texas and Arkansas before entering Arkansas, turning south near Fulton, Arkansas, and flowing into Louisiana, where it flows into the Atchafalaya River. The total length of the river is , with a mean