CHILDREN build sandcastles. Hillwalkers leave rock cairns to aid fellow walkers or to stand testament to their passing. The religious or the superstitious tie rags to trees at holy sites. It seems, then, that a human desire to make a mark on the landscape is innate and ancient.

A FORMER American Navy SEAL who retired to West Cork died from a combination of drowning and heart failure while diving alone last summer, an inquest heard yesterday.