Wirral Peninsula

Wirral or the Wirral (/ˈwɪrəl/) is a peninsula in northwest England. It is bounded to the west by the River Dee, forming a boundary with Wales, to the east by the River Mersey, and to the north by the Irish Sea.

The roughly rectangular peninsula is about 15 miles (24 km) long and 7 miles (11 km) wide. Historically, the Wirral was wholly within Cheshire; in the Domesday Book, its border with the rest of the county was placed at "two arrow falls from Chester city walls." However, since the passing of the Local Government Act 1972, only the southern third has been in Cheshire, with the rest a metropolitan borough in the new county of Merseyside.