Super beautiful! They have student pricing so make sure to ask if you can (it’s if you’re under like 25 I think). Lovely art. Docents everywhere. Dress up!
Also bag check is free or very cheap which is nice!
Absolutely brilliant stop for art lovers, great gallery with some amazing pieces and a lot of history. Extra bonus to here (as well as a lot of attractions in Madrid) is that students can go free. Always keep an eye out for young people discounts too. There is a nice cafe inside but it's worth eating in one of the bars hidden on the side roads nearby instead of having fairly sandard food for above standard prices at the museum.