That's what I'm trying to incorporate in my 1st letterbox: aesthetic
and enriching elements. I hope the aesthetic touches will be
appreciated, and that there will be some new factoids/tidbits gained
along the way that will make it worth the while to get to my
letterbox(es).

Working on my first right now, and I might as well let you all know
that it's Box #1 of a 3 part series. I'm designing it so that you
MUST do them in order, because each one will need something from the
prior solution. (That circumvents some attempts at guessing w/o
solving and skipping some of my work - heheheh!)

Yes, time consuming, and the mess in my apt. shows it! I have vast
supplies of art and craft items that are coming in very handy. I
figure if I'm going to do these, they might as well be art in
themselves. I also hope that by doing this, they'll have more
appeal, and hopefully, more traffic.

I also pulled out my collection of books about weird and strange
places in San Francisco... a wealth of ideas in my hands and already
working with my vivid imagination... and you thought you knew San
Francisco! Ha ha ha ha ha! [EVIL GRIN]