Earlier this year I saw mention in The New Yorker of a performance by the Brooklyn Raga Massive of In C by Terry Riley. It got a great review, and I was delighted to find the recording on Bandcamp, which I ordered immediately. It came out last month and I’ve listened to it several dozen times.
If you have access to a streaming music service, there will probably be several performances of “In C” available. If you like one, try them all. It’s not to everyone’s taste, but I think it’s an incredible composition and every performance I’ve heard has had at minimum a good dose of magic in it.