Arno Rafaesl Minkkinen is a performance artist and a photographer. He started making self-portraits in the early seventies and hasn’t stopped making them since. Most of his shots are difficult and dangerous enough that a lot of photographers wouldn’t attempt them even when fully clothed. Arno, on the other hand, does it naked as the day he was born. He obviously enjoys the challenge. He has even incorporated himself into some of his landscapes with surprisingly pleasing results.
Have a look at his website.