Must visit musea in Spain

• Museo Nacional del Prado, Madrid: Housing a vast collection of Spanish and European art from the 12th to the early 20th centuries, including masterpieces by Velázquez, Goya, El Greco, and Titian.
  
• Museo Reina Sofía, Madrid: Explore modern and contemporary art, featuring works by Picasso, Dalí, and Miró, housed in a beautifully renovated 18th-century hospital building.
  
• Guggenheim Museum, Bilbao: This Frank Gehry-designed architectural marvel showcases modern and contemporary art collections in a stunning titanium-clad building.
  
• Museu Picasso, Barcelona: Immerse yourself in the life and works of Pablo Picasso, who spent his formative years in Barcelona. See over 4,000 works spanning different periods and styles.
  
• Fundació Joan Miró, Barcelona: Dedicated to the works of Catalan artist Joan Miró, this museum showcases his unique style and playful sculptures in a light-filled building designed by Josep Lluís Sert.
  

Tips and information

• Most Musea like the Museo Nacional del Prado and Museo Reina Sofía will offer free admission for persons under 18 years.
• Some Musea in Madrid are closed on Tuesdays and Musea in Barcelona are closed on Mondays, Always check in advance before visiting.
• Free admission tickets are available for certain days or time slots, however not all musea do offer this service. 
• A Madrid Pass or Barcelona Pass might be beneficial if you're planning to other activities or visit more than several musea.
• A Passeo Del Arte for the top 3 Musea in Madrid is also an option to consider.