As I write this I think of all of the missed opportunities because I forget that museums, art installations, and unique shows are everywhere.
Begin with a general search online for "art installation". If you're having a hard time with finding something in your area, search for "places like Meow Wolf near me".
That search will bring you everything from modern day museums to abstract art on the street corner.
Searching for places like this in your area may also provide historic landmarks and smaller museums that you were not aware of. Don't be turned off by outdoor areas or gardens, those can be the most interesting.
Don't be scared to go to warehouse where a temporary art show is happening, that's a greta social event that could lead to even more opportunity and fun!
Be open to different expressions of art and you'll find this date idea easier than ever before.