Next spring (May/June) I plan to visit a friend who works in Copenhagen. She won't have a lot of time off from work while I'm there...but she's an avid traveler, and already knows she wants part of my visit to include a long weekend trip (probably 4 full days, Friday-Monday). We have both traveled extensively in the lower parts of Europe, but neither of us have been to Scandinavian countries.
Given the tight time frame, I think a destination reachable by a short flight or train trip is a good idea. Even with that in mind, the options are overwhelming...I've pondered taking one of the cheap Norwegian Air flights to Stockholm, Oslo, Tallinn, Riga, or Helsinki (all about 1 - 1.5 hour flights + to/from airport time). There also seem to be endless other parts of Denmark that are options too (e.g. Odense, Aero). We both like food, visiting historic sites, soaking up culture....we're RS-type travelers (carry on bags, no swanky hotels or destinations necessary), but seek maximum thrills per mile/dollar (as the guru says)
Any thoughts/suggestions, smart travelers? I have much time to plan and ponder, so I thought I'd ask for ideas and advice to add to the mix. Thanks in advance!