Seeing how you didn't ask "ciculating", this is an image af Andora's 2011 15 dinars, being adv. as a 2012. It's part of the "RENAISSANCE MADONNA" series. It's 40X60mm, 50g, .999 w/a 3Kmntg.
http://giladzuckerman.webs.com/mercuguinness.html#WEST_AFRICAN http://giladzuckerman.webs.com/mercuguinness.html#SENEGAL
As far as Silver and Gold coins I'd say the States followed by Mexico and maybe Belarus 3rd. Belarus has had some great designs recently. Maybe China third I like some of the past lunar Chinese dragon coins.
I think the only people who believe the USA has the most beautiful silver coins are those who have never collected world silver coins. There are a scant few beautiful USA silver coin designs, but in the scheme of world coins, the USA would rank far behind many many nations in my opinion. AND, for the record, I'm a USA citizen. PS, absolutely love that Gothic Victoria!
The renaissance talers from Europe. Hands down. Now THOSE are beautiful coins. Art. No side profile of some queen, a silly leaf from a tree, a single boring animal or a woman walking will ever match this.