The total surface of the United Kingdom is $243,610 km^2$. The highest point is the peak of Ben Navis in Western Scotland ($1,344m$). The lowest point is The Fens, approximately $3,900km^2$ of marshlands in the East of England lying $-4m$ below sea level.
The main rivers of the UK are the Thames in London, the Severn, the Humber, the Tees, the Tyne, the Twed, the Avon, the Exe and the Mersey.
In England, the most upland area is the Cumbrian mountains in the Lake District where the highest peaks in England stand: Scafell Pike ($978m$) and Helvellyn ($950m$). The Pennine chain is said to form the spine of England. It’s highest peak is Cross Fell ($893m$). Lowland areas are mainly chalk downlands.
Wales is predominantly hilly and mountainous, with its highest peak at $1,085m$ (Mount Snowdon or Yr Wyddfa in Welsh).
Scotland’s landscape is marked by deep glacial valleys dominated by mountains that stand among the highest in Great Britain, such as Ben Nevis ($1,344m$). The three topological regions are the Northern highlands, the Central Highlands and the Southern Uplands. Scotland has ski resorts and is also famous for its glens, which are long, narrow and deep valleys, as well as its lochs, narrow bays or arms of sea stretching inland.
Northern Ireland is a flatter country, with low-lying plateaus and hills. Its highest peak is $850m$ high (Slieve Donard).
The natural resources present in the UK include coal in the North and South Wales, petroleum and natural gas in the North Sea, tin, iron ore in Cumbria, Staffordshire and Lancashire, salt, lead and silica.
As far as agriculture is concerned in England, land is mostly used for grasses and grazing (37%), for crops and fallow (30%) and forestry (8.6%), according to the Department for the Environment, Food and Rural Affairs.
