Wark on Tweed Wark on Tweed Wark on Tweed (usually referred to simply as Wark) is a village in the English county of Northumberland. It lies approximately south west of Berwick-upon-Tweed. It is on the south bank of the River Tweed which marks the border between England and Scotland. The ruins of Wark on Tweed Castle, originally an early 12th century motte-and-bailey, lie at the west end of the village. The border between Scotland and England runs down the middle of the River Tweed, however between the villages of Wark and Cornhill the Scottish border comes south of the river to enclose a
Middle Yuba River Middle Yuba River The Middle Yuba River is one of the three main forks of the Yuba River in Northern California in the United States. The river rises at the crest of the Sierra Nevada, and flows generally west through canyons to join the North Yuba River near North San Juan. The confluence of the two rivers forms the main stem of the Yuba River, which then continues west to join the Feather River. The Middle Yuba forms much of the border between Nevada County and Sierra County and in its lower reaches a small segment of the Nevada–Yuba County