Everyone has their own ideas about London and will find different things when they visit. The capital of the United Kingdom is a multi-cultural melting pot and international trade and leisure centre. If hiring a car in London, you'll find the city covers a wide mostly flat area to the north and south of the River Thames in the southeast of England. The main institutions and landmarks tend to be found closer to the river, with the suburbs stretching in all directions beyond. Drivers will find an inner ring road called the North and South Circular roads, and an outer ring road called the M25.