If you can’t get to the real thing in person, why not take a free virtual tour at a museum? Google Arts and Culture has an extremely well put together tour offering of its own that will keep you occupied for hours on end. They cover many museums around the world from the comfort of your own room.
If you are more of a video person, why not consider heading over to Youtube? They have millions of wonderful videos touring everything from Monet’s home in Giverny to a behind the scenes at the Royal Opera House in London! You may even find yourself encountering a free stream of a performance. You never know what you will find. Happy hunting!