A natural pool set in a fold in steep side of the Malvern Hills with azure waters that offers a mesmerising reflections of the hills! (anneklienssolotravelsandadventure.com)
The topography here is unusual in as much there are many steep sided valleys with rivers that lead down to the sea. (judithcurry.com)
The pressure of the ice sheet constrains the lava flow, and glacial meltwater chills the erupting lava into fragments of volcanic glass, forming mounds and ridges with steep sides and flat tops. (sciencedaily.com)