Rivers play an important role in shaping the Earth's surface: they cause erosion as well as carrying and depositing sediment.
This animation demonstrates the most important relief features, surface waters and their relevant symbols.
Frank Lloyd Wright's well-known work is a masterpiece of modern organic architecture.
Vertical forces can break up layers of rock into fault blocks, which then move vertically along the fracture planes.
A game about sights around the world.
Water on Earth is in a continuous state of change. The water cycle includes processes such as evaporation, precipitation, melting and freezing.
A fjord is a long, narrow inlet with steep sides, created in a valley carved by glacial activity.
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.
Seawater, as an external force, plays an important role in shaping coastlines.
Karst formations include dolines and dripstones.
Machines converting the energy of flowing or falling water into useful forms of power were already in use in the Middle Ages.