Museo del Prado
Tuesday-Sunday 9:00-8:00 pm (closed Monday)
Admission: 6,00 euros (students: 3,00)
Free on Sundays
The Prado is overwhelming, but you have to be brave and go--how can you visit Madrid and skip the Prado? Break it down into manageable chunks, take it room by room, and you'll be fine.
It's full of the greats, all of Spain's darlings. Don't miss Goya, Velazquez, or El Greco. Of course, you'll also want to see the works by my personal favorite, Rubens. I love that his paintings shows up in almost every museum I've visited. He's excellent.
If you go in the summer, expect to fight the crowd, but I promise you, it's worth it for this museum. Enjoy!