Where's somewhere interesting that you've signed/written your name?

Okay define interesting right? By that I suppose I mean somewhere unusual or out of the ordinary. Or perhaps somewhere unexpected, worthy of credit. For instance, it may be the location that makes this signature memorable. Or what it was written on could be the determining factor. Maybe you wrote your name on an important document or high on a mountain in some exotic place. I hope my point has gotten across because i’m going to look pretty silly if it hasn’t!