The River Severn - The longest river in the UK., The River Thames - The second longest river in the UK., The source of a river. - Where a river begins: usually in the mountains or from a spring., The mouth of a river. - Where the river meets the sea., The Thames Barrier - Defences that help to prevent London from flooding when the river levels are high.,

Leaderboard

Visual style

Options

Switch template

Continue editing: ?