I ran across these amazing shots by Arthur S Mole and John D Thomas over at Cakehead Loves Evil. Apparently, these photos were comissioned as morale building exercises after WWI. Fascinating and cool.
These shots are interesting to me because the process must have been a daunting proposition. Making a pattern of that scale must have required some serious planning, not to mention surveying equipment.
even more pics over at Cakehead Loves Evil