Hi Ja6on, nice to know pot is legal in amsterdam.
EXCEPT IT'S NOT.
Jesus, pot is ILLEGAL EVERYWHERE IN THE WORLD.
Just because it is tolerated by the police in holland and a blind eye is turned does not mean suddenly its legal, you can still be arrested and prosecuted for it, be it selling, having just bought or smoking it, just the chances are extremely low because of the facts that:
Large amounts of people do it, can they arrest everyone? no.
Large amounts of revenue are generated through it, be they via tourism, taxes on shops and all the other ways governments make money.
There are loads more reasons, but its 2:30am and I'm too lazy to think of them.

In answer to your question, there is nowhere "legal" for you to smoke weed, although prosecution in holland is very unlikely, switzerland your about 60% safe seeing as the german and swiss police don't really care, but the french do.
England is also a reasonably safe place, I live here and grow/smoke/buy and have never been busted, probably because I'm careful but even people I know who have usually just get a finger wag and the smoke gets confiscated.