What are things you can do in Denmark that are only LEGAL in Denmark... things that would be illegal in other cities/countries?

Fisting is legal in denmark. If you google fisting or beastiality in good old britannia you get same sentence as nonses. So if i watch some brazilian girl with a horse. I'm guilty of forcing her to do it by watching a video

I can't think of anything, but until 2002 it was legal to try and escape from prison, but illegal to aid someone in escaping. I don't know if Denmark was the only country where this was legal, but I suspect trying to escape from prison is punishable in most countries.

There is a urban legend that there is an old, existing law that says it's legal to beat a Swede with a stick, dating back to the times where Denmark and Sweden were at constant war with each other. It hasn't been confirmed, though, and even if it existed it would have been overruled by the new laws regarding assault.

@oldprof in most euro countries the drinking age is the same or lower. nothing out of the ordinary.

I don't think there's anything legal only in Denmark

Drink alcohol at age 18. At least one could back in 1956 when I went to Copenhagen for a week. Maybe the laws have stiffened since then.

In Denmark, you can have sex with someone of the same gender. In Iran, that's a violation of law. Have a great time!