Glacier: a slowly moving mass or river of ice formed by the accumulation and compaction of snow on mountains or near the poles
Meanders:
A meander is one of a series of regular sinuous curves, bends, loops, turns, or windings in the channel of a river, stream, or other watercourses.
Beach: a pebbly or sandy shore, especially by the sea between high- and low-water marks.
A sand dune is a mound, hill or ridge of sand that lies behind the part of the beach affected by tides.
Waterfall :
A cascade of water falling from a height, formed when a river or stream flows over a precipice or steep incline.
Earthquake : a sudden violent shaking of the ground, typically causing great destruction, as a result of movements within the earth's crust or volcanic action.