Gottfried Semper, design drawing for a punch pot. Elevation, old stock, probably a 1903, paper, pencil, drawing, sheet size: height: 47 cm; width: 61.7 cm, signed: recto: - Album alb5147221
Alum Pot is a pothole with a large open shaft at a surface elevation of 343 metres on the eastern flanks of Simon Fell, North Yorkshire, England Stock Photo - Alamy