Interactivity and Adventure at Louisiana
If you like art galleries and ever spend a lot of time in Copenhagen, you'll probably take the train up to see the Louisiana Museum of Modern Art.
When I was 17 and looking for stuff to read in my local library, I found a book called Imaginary Games, which introduced me to the aesthetic theory that some kinds of artistic experience are centered on make believe games that the audience play as they interact with the object the artist has created. I later found out that the theory in question is lot more about the semantics of representational art than the aesthetics of abstract art - but my misinterpretation of it was incredibly influential on me at the time.
It opened up a whole new world of artistic experiences, by giving me a free pass to try to understand all sorts of interesting artworks. Before then I wasn't quite sure what you were supposed to do when you didn't immediately "get" a work of art. After my encounter with that book in the library I had a simple formula: you just look or listen closely and try to imagine you're playing a game with whatever components the artist has given you - try to make up stories about the different elements you see, and reflect on how those stories make you feel. Maybe, (like in some videogames) you might try to find easter eggs and hidden references, but doing so isn't as important as playing the game itself.
Since then, I've especially enjoyed playful art that encourages you to interact with it physically in some way, and Louisiana turned out to be a haven for this kind of work when I paid it a visit.
As well as having an indoor art gallery (which at the time had a bunch of scandalously interactive Marina Abramovic art) it also has a gorgeous permanent sculpture park. The sculptures are dotted around an area with a big lake and little hills overlooking the sea. The lake is inhabited by ducklings and surrounded by willows, and if you climb the hills to look out over the sea on a sunny day you can see all the way to Sweden. In order to find all the sculptures, you have to wander around this diverse landscape - looking in places you might not always expect.
Because of these particularly wild surroundings, a lot of the permanent artwork likes to play with the relationship between art and nature. This ranges from familiar techniques like setting kinematic sculptures that blow in the wind against a backdrop of the sky, and pointing mirrored surfaces at trees - to hidden paths cut into a hill that absorb the ground you are walking on into the work of art, physically drawing your body into the installation.
In addition to this a few of the installations in Louisiana did something I'd never really seen before, that combined the kind of playful interactivity I discovered when I was 17 and the interplay with natural surroundings that Louisiana had a knack for encouraging. Something about their scale and setting evoked more than the kind game you play in a quiet room with your friends - but rather the wild adventures you had as a kid where you ran around secret gardens or adventure playgrounds.