My Favorite MuseumsI've been to the Louvre twice. I could spend all day in there, and just marvel at the variety of art.
El Prado in Madrid. Seeing the works of Vazquez and Bosch were absolutely amazing.
The Vatican Musuem. In fact, almost the entire atmosphere surrounding Vatican City is like a museum. But, I had a great time especially anticpating my viewing of Michaelangelo's Sistine Chapel.