How does one interpret this?

There is a place called Tequila in Mexico, that many people have heard of from their export. It turns out, Tequila is a beautiful historic town that is surrounded by two mountains. The locals know the way to the top and from here there is a breathtaking view of the whole land, a gentle cool breeze, weird plants you probably have never even seen before, and eagles soaring down bellow. But even higher is a sheering rock that could break the necks of even the best climbers. And on top of this cliff is an iron cross that gleams in the afternoon sun. Somebody had the guts to climb up there only to plant this cross. Why? How does one explain this curious behaviour from the non-religious point of view?